delapre primary school - northamptonshire county council · mbp-5394: northampton schools expansion...
TRANSCRIPT
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F:\Projects\5300 - 5399\5394 - Northampton Primary Schools\07 Reports\7.1 MBP\MBP 5394 Delapre Primary School.docx
13 November 2012 jáÅÜ~Éä=_~êÅä~ó=m~êíåÉêëÜáé=iim=áë=~=iáãáíÉÇ=iá~Äáäáíó=m~êíåÉêëÜáé=êÉÖáëíÉêÉÇ=áå=båÖä~åÇ=~åÇ=t~äÉë=Ó=oÉÖ=kç=l`=PORNSQ=Ó=oÉÖáëíÉêÉÇ=~ÇÇêÉëë=NMRJNMV=píê~åÇ=içåÇçå=t`Oo=M^^
DELAPRE PRIMARY SCHOOL
NORTHAMPTON PRIMARY SCHOOLS EXPANSION
NOVEMBER 2012
MBP-5394: NORTHAMPTON SCHOOLS EXPANSION j_m=
DRAINAGE ASSESSMENTS
^ Based upon the discharge unit method from BS EN 12056 Part 2
* Based upon a 30 year return period.
PREAMBLE
This report has been prepared by Michael Barclay Partnership LLP on the instructions of, and for
the sole use and benefit of, the Client.
Michael Barclay Partnership LLP shall not be responsible for any use of the report or its contents for any purpose other than that for which it was prepared and provided. If the Client wishes to
pass copies of the report to other parties for information, the whole of the report should be copied. No professional liability or warranty is extended to other parties by Michael Barclay Partnership LLP as a result of permitting the report to be copied or by any other cause without
the express written agreement of Michael Barclay Partnership L LP.
MBP-5394: NORTHAMPTON SCHOOLS EXPANSION j_m=
DRAINAGE ASSESSMENTS
^ Based upon the discharge unit method from BS EN 12056 Part 2
* Based upon a 30 year return period.
DELAPRE PRIMARY SCHOOL (NN4 8JA) FOUL WATER ASSESSMENT
The new building contains 5 WCs, 3 WHBs, 1 Cleaner’s Sink, & 2 classroom sinks. This will increase the flows from the site by approximately 2.4 l/s^.
STORM WATER ASSESSMENT
The new building sits partly on impermeable and partly on permeable land. This results in an
increase of approx. 86m2 in impermeable area. Using the modified rational method, this will increase storm run-off from the site by approximately 3 l/s*.
FLOODING
The extract below (from EA indicative flood zone maps) shows that the site lies within flood zone 1 and the development site is less than 1 hectare. As such a flood risk assessment is not required.
DRAINAGE STRATEGY
The new building is located over the top of the existing storm water drains which will need to be diverted. Roof run-off shall be collected and discharged into the existing drain via new chambers. The foul drainage will be collects on the southern side and connect into the existing drainage system at the existing chamber to the southern side of the existing school building.
MBP-5394: NORTHAMPTON SCHOOLS EXPANSION j_m=
DRAINAGE ASSESSMENTS
^ Based upon the discharge unit method from BS EN 12056 Part 2
* Based upon a 30 year return period.
The drainage strategy is shown on drawing number MBP5394/507a and the increase in
impermeable area is shown on drawing number MBP5394/507b
This plan is provided by Anglian Water pursuant to its obligations under the Water Industry Act 1991 sections 198 or 199. It must be used in conjunction with any search results attached. The information on this plan is based on data currently recorded but the position must be regarded as approximate. Service pipes, private sewers and drains, and former private sewers and drains transferred to Anglian Water on or after 1 October 2011 are generally not shown. Users of this map are strongly advised to commission their own survey of the area shown on the plan before carrying out any works. The actual position of all apparatus MUST be established by trial holes. No liability whatsoever, including liability for negligence, is accepted by Anglian Water for any error or inaccuracy or omission, including the failure to accurately record, or record at all, the location of any water main, discharge pipe, sewer or drain or disposal main or any item of apparatus. This information is valid for the date printed. The plan is produced by Anglian Water Services Limited from Ordnance Survey © Crown Copyright, 100018507. This map is to be used for the purposes of viewing the location of Anglian Water infrastructure only. Any other use of the map data or further copies are not permitted. This notice is not intended to exclude or restrict liability for death or personal injury resulting from negligence.
Pumping Station
Manhole
Inlet
Outfall
Sewage Treatment Works
Foul Sewer
Final Effluent
Decommissioned Sewer
(Colour denotes effluent type)
(Colour denotes effluent type)
Surface Sewer
Combined Sewer(Colour denotes effluent type)
(Colour denotes effluent type)
(Colour denotes effluent type)
Date: 02/10/12 Scale: 1:1250 Data updated: 01/08/12Map Centre: 474667,259060.7Ordnance Survey Mapping © Crown Copyright 1000018507 Wastewater Plan A2Our Ref: 40815 - 3
Delapre
Rising Main
Private Sewer(Colour denotes effluent type)
Manhole Reference Liquid Type Cover Level Invert Level Depth to Invert
0801 F 68.88 66.07 2.81
0802 F 68.83 66.07 2.76
3001 F 72.03 68.98 3.05
3002 F 75.41 73.82 1.59
3003 F 73.88 72.25 1.63
3004 F 72.1 69.38 2.72
3802 F 83.03 80.84 2.19
3803 F 82.17 78.66 3.51
3900 F 76.09 73.99 2.1
3901 F 76.48 74.27 2.21
3902 F 77.84 75.77 2.07
4001 F 72.97 68.09 4.88
4002 F 73.13 71.02 2.11
4003 F 75.16 73.07 2.09
4004 F 78.221 76.09 2.131
4101 F 70.28 67.05 3.23
4102 F 72.1 69.38 2.72
4801 F 83.7 81.53 2.17
4802 F 83.51 80.73 2.78
4803 F 82.89 80.38 2.51
4900 F 82.01 80.11 1.9
4901 F 80.43 79.03 1.4
5000 F 70.02 68.18 1.84
5001 F 70.29 67.97 2.32
5101 F 67.85 64.79 3.06
5102 F 68.62 65.56 3.06
5202 F 61.69 59.45 2.24
5801 F 80.46 78.17 2.29
5901 F 76.68 74.18 2.5
6001 F 65.42 62.9 2.52
6101 F 63.43 62.9 0.53
6102 F 65.31 63.14 2.17
6103 F 63.54 60.55 2.99
6104 F 62.41 59.78 2.63
6105 F 64.09 62.83 1.26
6106 F -99 -99 -99
6107 F 62.58 60.54 2.04
6202 F 61.41 -99 2.22
6203 F 60.64 -99 2.12
6206 F 60.95 58.94 2.01
6901 F 72.48 70.01 2.47
7001 F 64.35 61.9 2.45
7101 F 63.1 61.14 1.96
7102 F 62.54 60.76 1.78
7103 F 61.87 60.06 1.81
7104 F 63.01 61.47 1.54
7201 F 60.94 59.78 1.16
7202 F 60.94 59.86 1.08
7203 F 60.39 58.93 1.46
7206 F 60.18 -99 4.54
7803 F 71.35 67.2 4.15
7901 F 67.85 64.87 2.98
7902 F 69.42 67.38 2.04
7903 F 67.87 66.09 1.78
8001 F 65.23 63.67 1.56
8002 F 63.21 61.12 2.09
8003 F 63.2 60.65 2.55
8004 F 63.03 -99 -99
8005 F 65.2 61.15 4.05
8101 F 62.04 59.79 2.25
8102 F 61.35 60.78 0.57
8103 F 62.6 61.31 1.29
8104 F 62.26 60.98 1.28
8105 F 61.59 60.23 1.36
8201 F 60.94 59.43 1.51
8202 F 60.89 58.77 2.12
8203 F 60.17 58.24 1.93
8204 F 59.95 59.46 0.49
8801 F -99 -99 -99
9101 F 61.6 59.56 2.04
9102 F -99 -99 -99
9201 F 60.32 58.56 1.76
9202 F 60.03 58.11 1.92
Manhole Reference Liquid Type Cover Level Invert Level Depth to Invert
7953 S -99 64 -99
7954 S 67.45 62.14 5.31
7955 S 68.35 62.85 5.5
7956 S 69.3 66.67 2.63
8051 S 63.25 -99 3.01
8052 S 63.02 61 2.02
8053 S 63.24 -99 2.25
8054 S 65.22 61.11 4.11
8055 S 62.99 61.89 1.1
8056 S 63.39 60.06 3.33
8057 S 63.33 -99 3.1
8151 S 62.07 59.77 2.3
8152 S 62.17 61.04 1.13
8153 S 62.51 59.9 2.61
8154 S 61.8 60.57 1.23
8155 S 63.06 61.8 1.26
8156 S 62.29 59.71 2.58
8251 S 60.11 -99 1.17
8252 S 60.16 58.03 2.13
8253 S -99 -99 -99
8851 S 67.4 65.13 2.27
8951 S 65.99 61.19 4.8
9051 S 64.24 60.26 3.98
9151 S 61.35 59.41 1.94
9152 S 61.49 59.22 2.27
9153 S -99 -99 -99
9154 S 62.21 59.83 2.38
9251 S 60.79 58.42 2.37
9252 S -99 58.11 -99
9254 S 60.36 58.75 1.61
9255 S -99 -99 -99
9851 S 67.95 65.99 1.96
Manhole Reference Liquid Type Cover Level Invert Level Depth to Invert
9203 F 60.78 58.39 2.39
9204 F 60.01 58.07 1.94
9206 F 59.77 59.22 0.55
9207 F 60.27 59.02 1.25
9208 F 59.99 55.51 4.48
9209 F -99 -99 -99
9210 F 59.86 55.51 4.35
9211 F -99 -99 -99
9801 F 67.97 65.32 2.65
0152 S 62.2 59.62 2.58
0851 S -99 66.68 -99
0852 S 68.88 66.84 2.04
3052 S 69.82 68.74 1.08
3053 S 72.816 70.454 2.362
3054 S 73.05 71.16 1.89
3055 S 73.54 70.82 2.72
3056 S 75.48 72.47 3.01
3057 S 73.97 71.81 2.16
3151 S 67.14 65.27 1.87
3152 S -99 -99 -99
3153 S 67.25 65.8 1.45
3154 S 68.07 66.2 1.87
3853 S 82.23 79.12 3.11
3854 S 82.93 80.93 2
3951 S 76.43 73.15 3.28
3952 S 76.08 72.85 3.23
3953 S 75.49 73.92 1.57
3955 S 77.94 76.15 1.79
4051 S 72.4 70.48 1.92
4052 S 74.84 73.21 1.63
4053 S 72.28 70.22 2.06
4054 S 73.44 71.64 1.8
4055 S 75.5 73.78 1.72
4056 S 72.46 66.66 5.8
4057 S -99 -99 -99
4851 S 83.13 79.03 4.1
4853 S 83.64 81.1 2.54
4854 S 83.69 81.83 1.86
4855 S 82.92 80.88 2.04
4951 S 78.73 77.06 1.67
4952 S 80.11 77.82 2.29
4953 S 81.95 78.85 3.1
4954 S 80.13 77.66 2.47
5051 S 73.45 71.69 1.76
5052 S 70.27 68.81 1.46
5053 S 70.17 66 4.17
5151 S 69.98 67.23 2.75
5152 S 63.12 62.15 0.97
5153 S 67.87 65.72 2.15
5154 S 68.55 65.87 2.68
5155 S 70.18 66.07 4.11
5251 S 61.88 60.7 1.18
5252 S 62.8 61.4 1.4
5851 S 80.47 78.68 1.79
5951 S -99 74.73 -99
5952 S 80.42 76.6 3.82
5953 S 77.07 74.01 3.06
6051 S 65.43 63.23 2.2
6151 S 62.25 61.7 0.55
6251 S 60.47 59.67 0.8
6252 S 60.58 -99 1.1
6253 S 61.23 -99 0.54
6254 S 61 60.07 0.93
6951 S -99 -99 3
6952 S 72.17 69.17 3
7051 S 65.16 62.81 2.35
7052 S 64.35 62.1 2.25
7151 S 61.92 60.69 1.23
7251 S 60.37 59.24 1.13
7252 S 60.4 59.72 0.68
7852 S 71.12 67.68 3.44
7951 S 69.52 67.84 1.68
7952 S 67.91 64 3.91
Manhole Reference Liquid Type Cover Level Invert Level Depth to Invert
1.3
denv
er™
pole
denver™ poleap
plic
atio
ns Landscaped areas
Car parks
Amenity areas
Retail parks
Entrance roads
Pedestrian areas
The Denver™ Pole Mount luminaire with its attractive
contemporary styling and exceptional performance
characteristics is unsurpassed in meeting modern
lighting design criteria for striking landscape illumination
at night, coupled with aesthetic appeal by day. The latest
control gear and lamp technology, coupled with a
precisely engineered anodised reflector, achieve
maximum performance and high efficiency. Compliance
with Night Time Friendy requirements is easily achieved
due to precise light control.
1.4
denv
er™
pole
amenity
features and benefits
Contemporary styling
> Unique aesthetic appeal to
complement today’s architecture
High quality construction
> Durability
> Fully Weather Sealed
Controlled upward light
> ‘Night Time Friendly’
Two light distributions
> Maximum efficiency and uniformity
for any application
Extensive choice of bracket permutations
> Unique appearance for every
application
> Flexibility of design
Tool-free access to lamp & gear tray
> Easy maintenance
< grange park school - northampton
lamp types included
35W - 150W metal halide (various)
70W - 150W high pressure sodium
32W - 42W compact fluorescent (twin lamp)
IP rating
IP657
approvals
Complies with EN60598
1.5
denv
er™
pole
short arm- 150mmlong arm - 400mm
0˚ version
5˚ version
600
10 Ø
250
200
200
190
330
short arm- 150mmlong arm - 400mm
515
60mm ø side entry bracket shown
DPS.WB - wall bracket
Photometric data is availableat www.holophane.co.uk
specification
The luminaire shall consist of a polycarbonatelens housed in an ABS alloy door arrangementwith a high pressure die-cast aluminium body,housing integral control gear to suit a wide rangeof high intensity discharge or compactfluorescent lamps. An acrylic lens shall beavailable as an option. The optical arrangementshall consist of an anodised aluminium reflectorand injection moulded polycarbonate or acryliclens. The door shall be secured to the body bytwo concealed latches providing tool free accessfor maintenance. The two sections shall besealed by a closed cell silicone gasket ensuringIP65 is maintained. The luminaire complies withEN60598 and has a range of complementarybrackets and column permutations available.
windage
Code
Denver™ Pole 0.1m2
Asymmetric (.AY)
Street (.NR)
weights & thermal data
Lamp Type Weight (kg) Min. Operating Max. AmbientTemperature (˚C) Temperature (˚C)*
70W High Pressure Sodium 7.1 -30 60100W High Pressure Sodium 7.8 -30 50150W High Pressure Sodium 8.5 -30 5035W CDMTF3 Metal Halide 7.1 -20 5570W CDMT3 Metal Halide 7.1 -20 75100W CDMT3 Metal Halide 7.8 -20 60150W CDMT3 Metal Halide 8.5 -20 5032W (Twin) Compact Fluorescent 5.6 -10 5042W (Twin) Compact Fluorescent 5.6 -10 50
* The maximum ambient temperatures stated are for exterior use only. For interior use deduct 10˚Cfrom the temperature stated. Note: For photocell options please deduct 15˚C for 100 & 150W types.
light distributions
denv
er™
pole
1.6
amenity
Asymmetric
Street
optical versatility
Two choices of optical arrangementsare available for the DenverTM Pole Mountluminaire, asymmetric & street.
Controlled directional light, minimising:
> Light pollution
> Light spill
> Discomfort glare
Precision engineered anodised semi-specularaluminium reflectors ensure either maximumlateral and forward distribution (streetdistribution), ideal for entrance roads, or anasymmetric distribution for car parks,pedestrian areas and retail parks. Both lightdistributions provide excellent uniformity.
easy maintenance
Internal component layout allows easy accessto all critical components. The control gear issecured to a removable geartray which can beeasily lifted out for maintenance purposes.
Tool-free latches allow quick andeasy access for maintenance.
Mains termination block
Reflector & lampholderarrangement
Control gear
Removable geartray
Door retaining strap
1.7
denv
er™
pole
denv
er™
pole
1.8
amenity
ordering details : luminaire
DPS.BLS
luminaire accessories order separately for on-site installation by othersCode
DPS.BLS Back-light Shield (for asymmetric only)
DPS.42 42mm Adaptor (reduces 60mm entry to 42mm)
Example
< milton keynes hospital subway - netherfield
CodeDPS Denver Pole
Code Lamp Type .70XT 70W Clear High Output HPS Lamp (E27) Base.100XT 100W Clear High Output HPS Lamp (E40) Base.150XT 150W Clear High Output HPS Lamp (E40) Base.35CDMTF3 35W Clear CDMT 3000K Metal Halide Lamp (G12) Base*.70CDMT3 70W Clear CDMT 3000K Metal Halide Lamp (E27) Base*.100CDMT3 100W Clear CDMT 3000K Metal Halide Lamp (E27) Base*.150CDMT3 150W Clear CDMT 3000K Metal Halide Lamp (E40) Base*.232PL4 32W Twin 4000K Electronic Compact Fluorescent 4-Pin Lamp**.242PL4 42W Twin 4000K Electronic Compact Fluorescent 4-Pin Lamp**
Code Light Distribution
.AY Asymmetric
.NR StreetCode Colour
.C1 White (RAL 9016)
.C4 Graphite (RAL 7011)
.C6 Grey (RAL 7035)
.C7 Black (RAL 9005)
.C9 Metallic Silver (RAL 9006)
.RAL**** RAL colour (customer choice)***Code Options
.A Acrylic Lens****
.C Enhanced Paint Finish
.T PhotocellDPS .150XT .AY .C9 .C
* All ceramic lamp circuits contain timed ignitors. **.NR distribution only. ***Please specify RAL colour reference. ****For 100W maximum.Note: Luminaires are supplied as standard for use on 240V 50Hz supply and complete with lamp.For 230V 50Hz add prefix ‘N’. Other voltages available onrequest.
0 Degree Wall Bracket
DPS.WB.C1 White
DPS.WB.C4 Graphite
DPS.WB.C6 Grey
DPS.WB.C7 Black
DPS.WB.C9 Metallic Silver
DPS.WB.RAL**** RAL Colour (customer choice)
5º all brackets are available. Configuration e.g DPS.5WB.C7
contactHolophanefor details
1.9
denv
er™
pole
column accessories
Example
Code Tubular Compartment Columns (DPSB)HELB.FS1 J-Anchor bolts for flange base, 3m to 5mHELB.FS2 J-Anchor bolts for flange base, 6m to 8mHEL.CBEPAC Cut Out Box and Earth Plate for Armoured Cable*
Code Conical Steel Columns (DPSC)HELC.FS1 J-Anchor bolts for flange base, 3m to 5mHELC.FS2 J-Anchor bolts for flange base, 6m to 8mHEL.CBEPAC Cut Out Box and Earth Plate for Armoured Cable*
*please contact Holophane for details
Code Mid Hinged Columns (DSPMH)HELMH.FS1 J-Anchor bolts for flange base, 4m to 5mHELMH.FS2 J-Anchor bolts for flange base, 6m to 8m.RLR4 Raise lower rope 4m-5m .RLR6 Raise lower rope 6m.RLR8 Raise lower rope 8m
Conical Aluminium Columns (DSPAC)HELAC.FS1 J-Anchor bolts for Flange Base, 3m to 5mHELAC.FS2 J-Anchor bolts for Flange Base, 6m to 8mHEL.CBEPAC Cut Out Box and Earth Plate for Armoured Cable*
rockingham park - corby >
ordering details : columns & brackets
CodeDPSB Denver Tubular Base Compartment ColumnDPSC Denver Steel Conical ColumnDSPAC Denver Aluminium Conical ColumnDSPMH Denver Steel Mid Hinged Column
Code Luminaire Mounting Height.3 3 metres*.4 4 metres.5 5 metres.6 6 metres.8 8 metres
Code Column Category please refer to page 24.15 for definition of the EN40 guidelines.LMZ For light & medium area wind zones (EN40 rationalised wind zones).HVZ For heavy area wind zones (EN40 rationalised wind zones).HEZ For extra heavy wind zones (EN40 rationalised wind zones)
Code Brackets.1L Single head long bracket.1S Single head short bracket.2L Twin head long bracket.2S Twin head short bracket
Code Bracket Style.A0 Angle at 0°.A5 Angle at 5°
Code Colour.C1 White (RAL 9016).C4 Graphite (RAL 7011).C6 Grey (RAL 7035).C7 Black (RAL 9005).C9 Silver (RAL 9006).RAL**** RAL Colour (customer choice)**
Code Optional Base Type please refer to page 24.1 for details, base is dependant on height and type of column
.FB1 Flange Base
.FB2 Flange BaseCode Optional Column Finish.P1 Black undercoat primed.P2 Undercoat primed
to match RAL colour specified Code Optional paint Finish
(Bracket Only).C Enhanced paint finish
DPSB .3 .LMZ .1S .A0 .C1 .FB1 .P1 .C
*not available with DPSMH. **Please specify RAL colour reference.
for decorativecolumns see
page 24.1
denv
er™
pole
1.10
9.1
gate
way
®
gateway®
appl
icat
ions The Gateway® architectural bulkhead series offers a
variety of styles designed to accent architectural
settings and meet the needs of extreme environments
with its die-cast aluminium and injection-moulded
polycarbonate enclosures. Available in round and oval
shapes for wall or ceiling mounting, Gateway® provides
four distinct designs for a wide array of attractive looks
to enhance the space. The versatile Gateway® series
accepts a wide selection of compact fluorescent and
high intensity discharge lamps to provide superior
performance and uniform illumination, improving
visibility for commercial and institutional public use
facilities.
Public buildings
Entrances
Lobbies
Corridors
Canopies
Multi-storey
Car parks
gate
way
®
9.2
gateway round
opal lens
eyelid design
features and benefits
Contemporary styling in different shapes
> Aesthetic appeal to complement
today’s architecture
High quality construction
> Durable and vandal-resistant
Total lamp obscurity
> Even, glare-free illumination
Polycarbonate lens
> Flexibility of use
Choice of lamp types
> Versatility
Totally enclosed luminaire
> Suitable for wide range of
applications
lamp types included
35W - 70W metal halide
18W - 42W compact fluorescent (various)
IP rating
IP659
approvals
Complies with EN60598
gateway oval
5 kg
interior
9.3
gate
way
®
gateway round slim line gateway round slim line eyelid
gateway oval slim line eyelid gateway oval slim line
light distributions
150mm
weights & thermal data
Unit Lamp Type Weight (kg) Min Operating Max Ambient*Temperature (˚C) Temperature (˚C)
GRC 35W CDMT 5.6 -20 25
GRC 70W CDMT 5.9 -20 25
GRC 26W TRT 5.3 / 4.5* -5 25
GRC 32W TRT 4.5 -10 25
GRC 42W TRT 4.5 -10 25
GRC 2 x 42W TRT 4.8 -5 25
GRS 2 x 26W PL 3.1 -5 25
GRS 32W TRT 2.9 -10 25
GRS 26W TRT 2.9 -5 25
GOC 42W TRT 3.7 -10 25
GOC 18W TRT 4.5 / 3.7* -5 25
GOC 35W CDMT 5.6 -20 25
GOS 32W TRT 2.4 -10 25
GOS 26W TRT 2.4 -5 25
GOS 18W TRT 2.4 -10 25
* Non emergency onlyEmergency below:26W TRT Round Emergency +25˚C26W TRT Emergency +25˚C18W TRT Oval Emergency +25˚C
specification
The (round / oval) bulkhead luminaire shallconsist of a powder coated pressed steel backplate (GRS / GOS) or a die cast aluminiumhousing (GRC / GOC) and a cast aluminiumbezel. The housing encloses a reflector andintegral control gear to suit a choice of 18W,26W, 32W, 42W TRT compact fluorescent lampsor 35W, 70W ceramic metal halide high intensitydischarge lamps, depending on whether this beGRS/GOS or GRC/GOC. The lens shall be a UVstabilised opal diffuser secured in place by a diecast aluminium bezel ensuring environmentalprotection to IP659 (20 joules impactresistance). The luminaire shall be suitable forsurface mounting and complies with EN60598with a choice of options and accessories.
Ø 356
.RF1
.RF1
.RF2
.RF3
175
356
104
229
.OF1
.OF2
.OF3
104
173
GRS
GRC
GOC
GOS
Photometric data is availableat www.holophane.co.uk
gate
way
®
9.4
.RF1
.RF2
.RF3
.OF1
.OF2
.OF3
round style oval style
interior
9.5
gate
way
®
ordering details : luminaire
CodeGRS Round Gateway slim-line bulkheadGRC Round Gateway cast bulkhead
Code Lamp Type .35CDMTF3 35W Clear CDM-T 3000K ceramic metal halide lamp (G12) base*.70CDMT3 70W Clear CDM-T 3000K ceramic metal halide lamp (E27) base*.26TRT 26W Triple tube 4000K compact fluorescent 4 pin lamp (Gx24q-3) base.32TRT 32W Triple tube 4000K compact fluorescent 4 pin lamp (Gx24q-3) base.42TRT 42W Triple tube 4000K compact fluorescent 4 pin lamp (Gx24q-4) base*.242TRT 2 x 42W Triple tube 4000K compact fluorescent 4 Pin lamp (Gx24q-4) base*.226PL4 2 x 26W 4000K Compact fluorescent 4 pin lamp (G24d-2) base**
Code Style.RF1 Round front design with opal polycarbonate lens.RF2 Round front with horizontal eye lid design with opal polycarbonate lens.RF3 Round front with cross design with opal polycarbonate lens
Code Colour.C1 White (RAL 9016).C4 Graphite (RAL 7011).C6 Grey (RAL 7035).C7 Black (RAL 9005).C9 Metallic Silver (RAL 9006).RAL**** RAL Colour (Customer Choice)***
Code Options †.ME Self contained 3 hour maintained emergency battery & invertor.T Factory fitted miniature photocell.TW Through wiring.V Tamper resistant screws†.SHR Decorative shroud††
Code Optional Paint Finish .C Enhanced paint finish*
GRC .70CDMT3 .RF1 .C9 .T .C
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Ion Acoustics Ltd. Consultants in Acoustics Registered in England and Wales No. 5920418
DELAPRE PRIMARY SCHOOL
ENVIRONMENTAL NOISE SURVEY
Acoustics Report A532/R03
24th October 2012
Report for: Northampton Schools Ltd
Report issued to:
Architecture Initiative 3rd Floor West 385 Barrett Street W1U 1AY Attention: Rowan Parnell
Prepared by: Checked by: Chris Borak BSc MIOA David O'Neill BEng MSc CEng MIOA Issue/Revision number Date A532/R03
24/10/2012
Delapre Primary School – Environmental Noise Survey
A532/R03 24th October 2012
Contents 1 Introduction ........................................................................................................................... 1 2 Site Proposal .......................................................................................................................... 1 3 Site and Surroundings ............................................................................................................. 2 4 The Building Regulations and Building Bulletin 93 (BB93) .......................................................... 2 5 Noise Limits............................................................................................................................ 3
5.1 External Noise Limits....................................................................................................... 3 5.2 Internal Noise Limits ....................................................................................................... 3
6 Noise Survey .......................................................................................................................... 5 6.1 Procedure ...................................................................................................................... 5 6.2 Measurements ................................................................................................................ 6 6.3 Weather Conditions ........................................................................................................ 6 6.4 Results – External Noise Levels ........................................................................................ 6
7 Implications for Ventilation ...................................................................................................... 8 8 External Plant Noise Limits ...................................................................................................... 8 9 Summary ............................................................................................................................... 9
Delapre Primary School – Environmental Noise Survey
A532/R03 24th October 2012 Page 1
1 Introduction
Ion Acoustics is appointed by Architecture Initiative on behalf of Northampton Schools Ltd to
provide acoustic advice on external noise in respect of potential expansion of a number of
primary schools in Northampton. This report relates to an external noise assessment for a
proposed new teaching block for Delapre Primary School in Northampton.
Requirement E4 of the Building Regulations applies to the acoustics of new school buildings and
applies to this project. Detailed advice on meeting the Building Regulations Requirement E4 is
provided in Building Bulletin 93 (BB93). This report relates only to environmental noise
affecting the proposed new teaching block.
Ion Acoustics has carried out a noise survey at the site to determine baseline environmental
noise levels. The results have been used to assess the implications for the ventilation strategy,
building envelope sound insulation and compliance with the noise level performance standards
in BB93. The results have also been used to determine suitable external plant noise limits for
the proposed development. This report documents the survey findings.
2 Site Proposal
The proposal is to construct a new single storey teaching block to the south of the existing main
Delapre Primary School building and just to the east of the existing early years block. The new
teaching block will likely comprise four classrooms and associated ancillary circulation and
accommodation space. The current preferred location for the new block is shown in pink in
Figure 1. Possible alternative locations are shown in blue.
Figure 1 – Proposed School layout and Survey Locations
Attended Monitoring
Location
Unattended Monitoring Location
Delapre Primary School – Environmental Noise Survey
A532/R03 24th October 2012 Page 2
3 Site and Surroundings
Delapre Primary School is in a predominantly residential area. The nearest significant road is
the A5123 (Towcester Road) which is 100m to the west. There is a row of two storey houses
between the site of the proposed new teaching block and Towcester Road which provides
significant acoustic screening.
Figure 2 – Arial Photograph: Showing distant noise sources
4 The Building Regulations and Building Bulletin 93 (BB93)
Requirement E4 from Part E of Schedule 1 to The Building Regulations 2000 states:
“Each room or other space in a school building shall be designed and constructed in such a way
that it has the acoustic conditions and the insulation against disturbance by noise appropriate to
its intended use.”
Approved Document E provides further information on complying with the Building Regulations
and includes the following statement:
“In the Secretary of State’s view the normal way of satisfying Requirement E4 will be to meet
the values for sound insulation, reverberation time and internal ambient noise which are given
in Section 1 of Building Bulletin 93 ‘The Acoustic Design of Schools’, produced by DfES.”
The performance standards indicated within Section 1 of BB93 should, therefore, form the basis
for the acoustic design of new schools. Section 1.1 of BB93 states that:
Delapre Primary School – Environmental Noise Survey
A532/R03 24th October 2012 Page 3
“The overall objective of the performance standards in Section 1.1 is to provide acoustic
conditions in schools that (a) facilitate clear communication of speech between teacher and
student, and between students, and (b) do not interfere with study activities.”
The BB93 standards and regulations are directly applicable to the following rooms and spaces:
• All teaching and learning spaces.
• Administration and ancillary spaces in as much as they affect adjacent learning spaces.
• Adult/Community education spaces (if any).
• Nurseries which are part of a school.
It is useful to note that meeting the numerical standards in BB93 is the normal method of
complying with Requirement E4. However, if alternative standards can be demonstrated to be
appropriate, then it can be acceptable not to comply with the numerical performance standards.
This is subject to agreement with the school and the building control body. Section 1.2.1 of
BB93 describes this process.
5 Noise Limits
5.1 External Noise Limits
BB93 gives fairly conservative advice on noise levels in respect of sites for new schools. Section
2.3 states: “If the noise measurement survey shows that the ambient external noise levels on
the site are below 45 dB LAeq, 30min…, no special measures are likely to be necessary to protect
the building or playing fields from external noise”. However, sites below 45 dB LAeq are rare in
urban areas.
In terms of playgrounds and playing fields, BB93 states “Noise levels in unoccupied
playgrounds, playing fields and other outdoor area should not exceed 55 dB LAeq,30min and there
should be at least one area suitable for outdoor teaching activities where noise levels are below
50 dB LAeq,30min.”
Note that, the recommendations on noise levels in outdoor areas in BB93 do not form part of
the Building Regulations and are, therefore, stated as non8mandatory guidance only. The
LAeq,30min index is defined as the equivalent steady8state noise level with the same energy as the
actual fluctuating noise over the time period (in this case 30 minutes).
5.2 Internal Noise Limits
In schools which are naturally ventilated, the internal noise climate is determined by noise
transmission from the exterior. For mixed mode or fully mechanically ventilated schools, the
noise climate is a combination of the noise from mechanical services and from the exterior. A
sound level difference of 10 dB is often assumed for a façade with open windows and,
assuming an internal noise limit of 35 dB LAeq, as recommended for classrooms in Table 1.1 of
BB93, this translates as a maximum external noise level of 45 dB LAeq as stated in Section 2.3
BB93 (quoted above).
Delapre Primary School – Environmental Noise Survey
A532/R03 24th October 2012 Page 4
External noise levels at most urban school sites exceed 45 dB LAeq, and hence the application of
the internal noise limits was revised in the Building Bulletin 101 “Ventilation in School Buildings”
(BB101). BB101 states that where natural ventilation is provided, the BB93 noise limits must be
maintained for ventilation rates of 3 l/s/person, but noise levels 5dB(A) higher are permitted at
a ventilation rate of 8 l/s/person (i.e. with windows more fully opened). Therefore, naturally
ventilated teaching rooms now effectively have two noise limits according to the ventilation
rate. These are set out in Table 1 below for various rooms.
The ambient noise limits given in BB93 represent the combined noise levels from the following
sources:
• External noise, e.g. traffic, railways, aircraft, industrial noise
• Mechanical services, e.g. Ventilation systems and Plant.
Noise sources excluded from the targets are:
• Teaching activities within the school premises including in playgrounds
• Equipment noise, e.g. from machine tools, computers, fume cupboards
• Rain noise – however, BB93 states that rain noise should be controlled so that it does
not impinge upon the performance of the school. Numerical targets are not specified.
Table 1 – Internal Noise Targets derived from BB93 and BB101
Room Internal Noise Limit,
LAeq,30mins dB at ventilation
rate of 3l/s/person and for
mechanical ventilation#.
Internal Noise Limit,
LAeq,30mins dB at ventilation
rate of 8l/s/person
(natural vent only)
Primary classrooms, Class bases,
General teaching areas, small
group rooms
35 dB 40 dB
Nursery school playrooms and
quiet rooms 35 dB 40 dB
Music Classroom 35 dB 40 dB
Assembly Hall 35 dB 40 dB
Library (Resource Area) 40 dB 45 dB
Classrooms* designed specifically
for use by hearing8impaired
students (including speech
therapy rooms)
30 dB* 30 dB*
* 8 Note that no relaxation is permitted for these rooms
# 8 Note that with mechanical ventilation the room must meet the lower BB93 target at the design
ventilation rate.
Hence, the general internal noise limit under natural ventilation conditions is LAeq 35 or 40 dB
depending on the ventilation rate for most teaching spaces. Note that, BB93 requires a lower
limit of 30 dB LAeq for rooms “specifically designed” for hearing8impaired pupils or for speech
therapy and that no relaxation is permitted under BB101. We are not aware of any
requirement for such rooms in the proposed new teaching block, but if there were, this must be
Delapre Primary School – Environmental Noise Survey
A532/R03 24th October 2012 Page 5
brought to the attention of the designers and the specific room would be subject to the more
onerous acoustic design criteria.
A window only slightly open and providing only background ventilation provides better sound
insulation than one which is fully open. Therefore, taking 10 dB(A) at standard attenuation for
an open window, sites which have external noise levels no greater than LAeq 50 dB are
demonstrably suitable for naturally ventilated teaching accommodation.
BB101 encourages the use of natural ventilation in schools. Where there are difficulties in
meeting these limits BB101 suggests that “alternative performances standards” as permitted
under Section 1.2.1 of BB93 may be appropriate, if agreed with the school and acoustic
specialist. BB101 states in section 1.6.1:
It is recognised that the acoustic needs of classrooms are stringent and may prevent the use
of natural ventilation in some circumstances, even given the suggested addition of 5 dB to the
requirements when providing external air at a rate of 8 l/s per person. Consequently, the
designer is advised to refer to section 1.2.1 of Building Bulletin 93
The aim of quoting this statement of ‘alternative performance standards’ for the acoustic
requirements in this Building Bulletin on ventilation, is to allow some flexibility so that the
ventilation requirements of schools can be met by natural means, wherever it is possible to
maintain a level of acoustic performance that is deemed appropriate by the users of the
school. It is intended that this will lessen the likelihood of an unwanted mechanical
ventilation system being installed, incurring unnecessary capital and running costs.”
It is, therefore, recognised that the benefits of providing natural ventilation may, for some sites
where noise levels are slightly above LAeq 50 dB, outweigh the slightly increased internal noise
levels. However, this would need to be accepted and approved as an “Alternative Performance
Standard” following the procedures of BB93. Effectively the school must agree to accept the
slight reduction in acoustic conditions.
6 Noise Survey
6.1 Procedure
The noise survey was carried out at the existing school site on 4rd October 2012. All
measurements were external. The measurement locations are shown on Figure 1.
Measurement microphones were mounted on tripods at around 1.5m above local ground level
and at least 3m from vertically reflective surfaces such as building façades or walls.
To properly access the site background noise level in accordance with BB93 and BS4142 it is
necessary to exclude activity noise from the existing school and any other non8typical noise.
The survey took place on a normal school day; therefore, it was necessary to pause the sound
level meter during periods of school activity as BB93 excludes school activity from the internal
noise limits. On the day of the survey there was significant interruption from construction work
Delapre Primary School – Environmental Noise Survey
A532/R03 24th October 2012 Page 6
taking place on a site immediately to the south east of the school site and the measurement
locations, noise from this was also excluded from measurements.
6.2 Measurements
Two monitoring systems were used; one was left to log unattended during the survey and the
other was used to perform attended measurements in octave frequency bands.
Measurements at the unattended location were made using a Rion NL52 sound level meter,
which logged noise levels in ten minute intervals. As the meter was unattended these
measurements included all activity noise from pupils and the construction work.
Measurements at the attended location were made using a Norsonic 140 sound level meter.
Attended measurements were generally in 10 minute intervals; however, some were cut short
by interruption. During attended monitoring, extraneous noise was omitted as far as possible.
Both meters were calibrated using a Brüel & Kjær 4231 calibrator before and after the
measurement periods. No drift in the calibration level was noted in either meter.
6.3 Weather Conditions
The weather conditions for the survey were recorded using a hand held anemometer and
thermometer and were as follows:
Average temperatures: 14°C
Wind Speed at microphone: 3 m/s
Wind direction: South8Westerly
There was no precipitation and weather conditions were conducive to successful noise
monitoring.
6.4 Results – External Noise Levels
The measured noise levels for the attended external position are given below in Table 2.
Delapre Primary School – Environmental Noise Survey
A532/R03 24th October 2012 Page 7
Table 2 – Attended Noise Survey Results
Start Time Duration (seconds) LAeq, dB LA01, dB LA90, dB
04/10/2012 13:44 00:10:00 51.3 62.7 45.3
04/10/2012 14:01 00:03:47 50.2 56.5 45.9
04/10/2012 14:06 00:10:00 47.1 54.0 44.1
04/10/2012 17:00 00:10:00 48.7 55.8 45.1
04/10/2012 17:10 00:10:00 48.8 52.1 46.8
04/10/2012 17:20 00:10:00 48.5 52.3 46.7
04/10/2012 17:30 00:10:00 48.8 54.4 47.3
Summary: (Average/Minimum)1 49.2 55.4 44.1
Note 1: The summary values are given as the energy average for LAeq, the arithmetic average for LA01 and the lowest measured value for LA90.
The results of the unattended survey have been plotted in Figure 3. Periods known to have
been affected by school activity noise have been shaded in red.
Figure 3 – Time history plot of noise levels from unattended monitor
Known periods of noisy school activity have been shaded in red in Figure 3. The impact of the
construction noise on the unattended monitoring can be seen from the erratic noise levels;
however, as these measurements were unattended, it is not possible to identify the noise levels
in the absence of the construction noise.
Attended measurements were not made during periods of significant construction and school
activity noise; however, due to the almost continuous construction noise and regular school
activity noise it was not possible to exclude these noise sources entirely. The construction
Delapre Primary School – Environmental Noise Survey
A532/R03 24th October 2012 Page 8
workers were asked to stop using a pneumatic breaker for a period to allow measurements to
take place. However, some construction activity, such as a cement mixer, was audible at all
times. From the attended measurement data the typical measured LAeq noise level was 49.2
dB; however, in the absence of all construction and school activity noise this would have been
lower.
There were no dominant off site noise sources identified during the survey; rather the ambient
noise climate was from distant sources in all directions. Therefore, although the measurement
locations were chosen to represent the current preferred position of the proposed teaching
block, noise levels at the alternative positions shown in Figure 1 are likely to be similar. The
findings discussed below, therefore, apply to the three possible positions of the new teaching
block.
7 Implications for Ventilation
In the absence of school activity noise and temporary noise sources (construction noise) the
typical ambient noise level on the school site is below 50dB LAeq.
The intention is to naturally ventilate the proposed building. Background ventilation of 3 l/s/p
can be provided through small window openings where sound insulation of 15 dB(A) can be
achieved. Hence under conditions with small openings, internal levels will be below LAeq 35 dB
With windows open to provide higher levels of ventilation (8 l/s/p +) attenuation of 10dB(A)
can be assumed through the façade. This will results in internal levels within the LAeq 40 dB
limit obtained by applying the 5dB relaxation allowable under BB101 for naturally ventilated
school buildings.
Therefore, the internal noise levels from external environmental noise will meet the internal
noise limits under the two natural ventilation conditions.
The noise levels are not high enough to impose any particular sound insulation requirements on
the building envelope. Any practical form of construction of glazing and external building fabric
will adequately control environmental noise levels
8 External Plant Noise Limits
It is unlikely that there will be any mechanical services plant associated with the new scheme,
and therefore, there would be no need for control of external plant. However, if plant were
added then the background noise levels measured can be used to determine the daytime plant
noise limit at nearby sensitive receptors.
This could be a requirement under a planning condition, typically at the nearest housing, or
under BREEAM if that were a project requirement. Under BREEAM 2011 Pol 05 the limit would
apply at either nearby housing or other teaching blocks in the school.
Delapre Primary School – Environmental Noise Survey
A532/R03 24th October 2012 Page 9
The lowest background noise level measured during the day was LA90 42 dB (measured at the
unattended location); this can be used to set a relative plant noise limit.
We have consulted with Natasha Stanley, senior environmental health officer for Northampton
Borough Council. She has advised that their current criteria for plant noise are as follows:
“Assuming the plant is emitting steady noise levels, whether it cycles on and off or not, we
expect that the operational noise levels (Leq,T) from that plant should be at least 6 dB below
the minimum Background (L90, 1hour), for the times of operation, at the nearest sensitive
location. This could be an amenity space for daytime or the proximity of a bedroom window
for night time.
Ideally this should be specified in octave bands but if assessed on A8weighted levels then
there should be a BS 4142 assessment that accounts for the character.”
Therefore in principle the plant limit to be would be 6 dB below the L90 in each octave band,
which is a relatively onerous criterion. It is not common to measure the background noise level
in L90 octave bands (particularly as many meters do not record this parameter). We have
recorded spectral L90 levels in some locations, but not all.
An alternative more standard criterion has been discussed and agreed with NBC; specifically
that, should there be any plant, then its rating level according to BS 4142 should be 10dB(A)
below the background noise level outside nearby housing or in gardens of housing or other
relevant amenity areas. The noise limit would therefore be LAr 32 dB.
The limit applies to the aggregate of all new plant operating
The BREEAM 2011 Pol 05 limit requires the rating level as defined by BS 7445 to not exceed the
background noise levels, LA90, by more than 5dB(A) outside nearby noise sensitive
developments. Hence a limit of 47 dB(A) would also apply outside the existing school teaching
room windows and at the nearby housing.
9 Summary
An external noise survey has been carried out at the existing Delapre Primary School in
Northampton. There is no dominant noise source affecting the school. Environmental noise
levels on site comprise road traffic noise from local roads and distant trunk roads. Typical noise
levels affecting the proposed building will be at or below LAeq 50 dB. Based on this, the
proposed natural ventilation design can achieve appropriate internal noise levels without
additional attenuation. The background noise levels measured have also been used to
determine plant noise limits at the nearby sensitive receptors.
Delapre Primary School – Appendix A Photos
A532/R03 24th October 2012 Page A1
Unattended Survey Location
Attended Survey Location
Delapre Primary School – Appendix B Tabulated Survey Data at Unattended Measurement Position
A532/R03 24th October 2012 Page B1
Unattended Measurements
LAeq LAmax (FAST) LAF01 LAF90
dB dB dB dB
10:00:00 50.7 70.7 61.4 43.1
10:10:00 45.9 63.6 52.1 43.6
10:20:00 53.4 71.0 66.5 44.2
10:30:00 47.4 62.2 55.8 43.0
10:40:00 69.3 87.7 79.3 42.1
10:50:00 76.2 94.4 84.0 71.0
11:00:00 58.8 76.3 72.2 43.8
11:10:00 47.4 63.1 54.3 43.1
11:20:00 47.5 62.6 55.9 43.6
11:30:00 59.0 79.9 71.6 43.5
11:40:00 45.4 55.3 50.9 43.1
11:50:00 52.1 62.2 59.2 45.0
12:00:00 67.3 88.6 76.3 53.5
12:10:00 72.7 87.7 82.2 61.9
12:20:00 79.0 93.3 88.6 71.5
12:30:00 75.7 90.4 84.9 58.7
12:40:00 76.9 90.9 85.0 71.1
12:50:00 73.4 89.6 83.3 47.0
13:00:00 52.5 63.3 59.3 45.2
13:10:00 51.1 65.1 59.4 43.5
13:20:00 64.6 81.5 74.7 49.7
13:30:00 66.5 81.2 75.9 48.4
13:40:00 58.0 76.5 70.3 44.0
13:50:00 55.2 74.9 66.2 44.8
14:00:00 48.7 71.9 55.3 44.5
14:10:00 47.1 67.0 52.8 44.1
14:20:00 61.3 80.0 73.1 48.6
14:30:00 72.7 87.6 80.5 65.3
14:40:00 52.8 73.6 65.2 44.5
14:50:00 52.7 75.6 62.0 46.9
15:00:00 68.5 90.8 80.2 53.5
15:10:00 60.2 84.2 72.6 45.1
15:20:00 55.0 76.4 65.7 46.0
15:30:00 56.6 75.2 67.8 46.5
15:40:00 55.3 75.7 66.3 46.2
15:50:00 55.8 74.3 67.1 46.9
16:00:00 56.7 74.8 67.0 47.8
16:10:00 56.1 80.3 68.9 43.3
16:20:00 55.3 76.0 65.7 45.5
16:30:00 59.2 77.0 70.0 48.8
16:40:00 59.7 75.7 69.7 46.5
16:50:00 55.8 79.5 66.6 45.7
17:00:00 50.2 71.9 60.1 43.5
17:10:00 47.3 57.1 50.7 45.1
17:20:00 46.0 60.2 50.3 43.7
17:30:00 46.6 60.1 52.7 44.4
Time
Delapre Primary School – Appendix B Tabulated Survey Data at Unattended Measurement Position
A532/R03 24th October 2012 Page B2
Attended Measurements 8 Octave Band Data
63 Hz 125 Hz 250 Hz 500 Hz 1.0 kHz 2.0 kHz 4.0 kHz 8.0 kHz
04/10/2012 13:44 00:10:00 51.3 62.0 57.3 55.0 50.2 43.7 37.7 33.7 26.3
04/10/2012 14:01 00:03:47 50.2 60.9 60.2 49.3 46.7 44.3 40.5 36.3 29.2
04/10/2012 14:06 00:10:00 47.1 59.1 53.1 46.8 43.9 42.5 37.0 31.4 26.0
04/10/2012 17:00 00:10:00 48.7 57.2 52.1 48.2 45.2 44.3 39.5 35.9 32.0
04/10/2012 17:10 00:10:00 48.8 56.8 53.1 51.5 45.3 44.3 37.3 29.9 26.8
04/10/2012 17:20 00:10:00 48.5 58.3 53.0 48.1 44.9 45.4 37.3 28.1 24.5
04/10/2012 17:30 00:10:00 48.8 57.8 52.1 48.2 44.8 46.2 37.5 25.6 21.7
LAeq, dBLAeq, dBDurationDate
Delapre Primary School Additional Information on Noise Following Alteration to the Proposed Location
A532 26th March 2013 Page 1
The noise survey for Delapre Primary School was carried out before the final location was
determined. The proposed locations for the new developments are shown in Figure A1; below.
Figure A1 – proposed site plan
The new reception classroom next to the new covered play area was not in the original plan
and therefore noise levels were not surveyed at this location. The following noise sources were
heard and noted during the survey:
• Towcester Road
• Rothersthorpe Road
• Aircraft Noise
The reception classroom is further from Towcester Road than the survey location and
completely screened from Rothersthorpe Road. Therefore, it will be exposed to slightly lower,
but similar, noise levels to the main part of the new building which was surveyed. The
conclusions from the noise survey report, therefore, will also apply at the location of the new
reception classroom and natural ventilation with openable windows will be feasible.
Surveyed
Location