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1 BCO SPECIFICATION FOR OFFICESQ uick Guide to Key Criteria 2009 - 2014 Comparison2 | GARDINER & THEOBALD Guide4 BCO SPECIFICATION FOR OFFICES | 301 / INTRODUCTIONBCO SPECIFICATION FOR OFFICESQUICK GUIDE TO KEY CRITERIA2009-2014 COMPARISONThe sixth edition of the British Council for Offices (BCO) Guide to best practice in the specification for offices has been have compared the recommended criteria ranges of the new 2014 guide against the previous 2009 guide in the attached reference INFORMATIONP lease speak to your Gardiner & Theobald expert, or contact:Gavin Murgatroyd (Partner, London)Gardiner & Theobald10 South CrescentLondon WC1E 7 BDT: +44 (0)20 7209 us on Twitter | GARDINER & THEOBALD LLP02 / QUICK GUIDE20092014 CHANGEOCCUPANCYW orkplace density (NIA per workspace)8 - 13 m 8 - 13 m Means of escape (NIA per person)6 m 6 m Core elements (NIA per person)12 m 10 - 12 m ( 2m )On floor services (NIA per workspace)10 m 8 - 10 m ( 2m )FLOOR PLATE EFFICIENCY NIA:GIALow rise buildings (up to 9 storeys)80 - 85%80 - 85%PLAN DEPTH & CEILING HEIGHTDeep Plan.

2 Window to Window (or atrium)15 - 21 m15 - 21 mWindow to Core6 - 12 m6 - 12 mFinished floor to underside of - m-Shallow Plan:Window to Window (or atrium)12 - 15 m12 - 15 mWindow to Core6 - m6 - mFinished floor to underside of - m-Floor to ceiling/clear - - m( ) (minimum)GRIDSP lanning m * m * mColumn m, m and m, m, m and of primary circulation to NIA15% to 22%15% to 22%TOILET PROVISIONNIA per person12 m 10 m ( 2m )Male/female ratio60%/60%60%/60%Unisex100%100%CYCLING PROVISON AND SHOWERSS ecure cycle spaces-1 cycle per 10 staffShower facilities-1 shower per 100 staffMale/female ratio-60% male/40% femaleSecure lockers-1 locker per cycle spaceBCO SPECIFICATION FOR OFFICES | 502 / QUICK GUIDE20092014 CHANGELIFTSP erformance requirements:Car loading80% (60-70% scenic)80%Waiting time (up-peak)< 25 seconds< 25 secondsHandling capacity (up-peak)15%12% (85/10/5)( 3% )Waiting time (two way lunchtime)-< 40 secondsHandling capacity (two way lunchtime)12%13% (45/45/10)+ 1%NIA per person12m 10-12m ( 2m )Hall call system.

3 Time to destination< 90 seconds (up to 15 floors)< 90 seconds (up to 15 floors)RAISED FLOORST ypical floors - new-build150 mm (overall)150 mm (overall)Typical floors - refurbishment-100mm (overall, minimum)Trading floors300 - 500 mm (overall)300 - 500 mm (overall)STRUCTURAL LOADINGSLive:Ground floor and below ground office kN/m kN/m Above kN/m kN/m High load areas (over approx 5% of floor area) kN/m kN/m - kN/m - kN/m Car kN/m Loading - 10 kN/m Plant kN/m Retail kN/m Floors, Ceilings & kN/m kN/m SMALL POWERL oading diversified on floor distribution (based on 1 workspace per 10m )25 W/m 20 - 25 W/m ( 5 W/m )Diversified load (1000m )15 W/m 13 - 15 W/m ( 2 W/m )6 | GARDINER & THEOBALD LLP02 / QUICK GUIDE20092014 CHANGELIGHTINGD aylighting (target)2% average.

4 Minimum2% - 5%+ 3%Average Maintained Illuminance:VDU Use300-500 lux300-500 luxPaper based tasks500 lux500 luxTask ( )Unified Glare Rating (UGR)1919 Electrical Load Allowance12 W/m (Incl. task lighting & CAT B allowance)10 W/m (Incl. task lighting & CAT B allowance)( 2 W/m )Lighting Energy Use15-30 kWhr/m /yr12-22kWhr/m /year( 3 - 7 k Whr/m /yr )COMFORTA irtightnessNot more than /hr/m for building at 50paNot more than /hr/m for building at 50paAirtightness - naturally ventilated buildingsNot more than 7m /hr/m for building at 50paOutdoor air12-16 l/s per person12-15 l/s per person( 1 I/s per person)Occupancy1 Workspace per 10 m 1 Workspace per 8 - 10 m ( 2m )Air conditioned space:Summer 24 C 2 C24 C 2 CWinter20 C 2 C20 C 2 CMixed Mode/Natural Vent:SummerNot to exceed 25 C for more than 5% of occupied hours.

5 Not to exceed 28 C for more than 1% of occupied hoursNot to exceed 25 C for more than 5% of occupied hours. Not to exceed 28 C for more than 1% of occupied hoursWinter20 C 2 C20 C 2 C02 / QUICK GUIDEBCO SPECIFICATION FOR OFFICES| 720092014 CHANGENOISE CRITERIAE xternal Noise Intrusion:Open PlanNR40 (Leq)NR40 (Leq)SpeculativeNR38 (Leq)NR38 (Leq)Cellular OfficesNR35 (Leq)NR35 (Leq)Building Services:Open PlanNR 40NR 40 SpeculativeNR 38NR 38 Cellular OfficesNR 35NR 35 SUSTAINABILITYBREEAM 2008 Rating for new & refurbished officesMinimum: Very Good Best Practice: Excellent Minimum: Excellent or Very Good.

6 Best Practice: Outstanding Note: The cells marked ( - ) indicate that data of that detail was not included within the publicationGARDINER & THEOBALD LLP10 South Crescent, London, WC1E SPECIFICATION FOR OFFICES2009-2014