Bco Specification For Offices

BCO SPECIFICATION FOR OFFICES Quick Guide to Key Criteria 2009 - 2014 Comparison

CONTENTS 1.0 2.0

Introduction Quick Guide

2 | GARDINER & THEOBALD LLP

3 4

01 / INTRODUCTION

BCO SPECIFICATION FOR OFFICES QUICK GUIDE TO KEY CRITERIA 2009-2014 COMPARISON The sixth edition of the British Council for Offices (BCO) Guide to best practice in the specification for offices has been published. We have compared the recommended criteria ranges of the new 2014 guide against the previous 2009 guide in the attached reference document.

FURTHER INFORMATION Please speak to your Gardiner & Theobald expert, or contact: Gavin Murgatroyd (Partner, London) Gardiner & Theobald 10 South Crescent London WC1E 7BD T: +44 (0)20 7209 3000 [email protected] Follow us on Twitter @gt_llp www.gardiner.com

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02 / QUICK GUIDE

OCCUPANCY Workplace density (NIA per workspace) Means of escape (NIA per person) Core elements (NIA per person) On floor services (NIA per workspace) FLOOR PLATE EFFICIENCY NIA:GIA Low rise buildings (up to 9 storeys) PLAN DEPTH & CEILING HEIGHT Deep Plan: Window to Window (or atrium) Window to Core Finished floor to underside of ceiling Shallow Plan: Window to Window (or atrium) Window to Core Finished floor to underside of ceiling Floor to ceiling/clear height: New-build Refurbishment GRIDS Planning grid Column grid CIRCULATION Percentage of primary circulation to NIA TOILET PROVISION NIA per person Male/female ratio Unisex CYCLING PROVISON AND SHOWERS Secure cycle spaces Shower facilities Male/female ratio Secure lockers

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2009

2014

8 - 13 m²

8 - 13 m²

6 m² 12 m² 10 m²

6 m² 10 - 12 m² 8 - 10 m²

80 - 85%

80 - 85%

15 - 21 m 6 - 12 m 2.6 - 2.75 m

15 - 21 m 6 - 12 m -

12 - 15 m 6 - 7.5 m 2.6 - 3.0 m

12 - 15 m 6 - 7.5 m -

2.6 - 3.0 m -

2.6 - 2.75 m 2.45m (minimum)

1.5 m * 1.5 m 7.5 m, 9.0 m and 12.0 m

1.5 m * 1.5 m 7.5 m, 9.0 m, 12.0 m and 15.0m

15% to 22%

15% to 22%

12 m² 60%/60% 100%

10 m² 60%/60% 100%

-

1 cycle per 10 staff 1 shower per 100 staff 60% male/40% female 1 locker per cycle space

CHANGE

( 2m² ) ( 2m² )

( 0.25m )

( 2m² )

02 / QUICK GUIDE

2009

2014

CHANGE

80% (60-70% scenic) < 25 seconds 15% 12%

80% < 25 seconds 12% (85/10/5) < 40 seconds 13% (45/45/10)

( 3% )

12m²

10-12m²

( 2m² )

< 90 seconds (up to 15 floors)

< 90 seconds (up to 15 floors)

RAISED FLOORS Typical floors - new-build Typical floors - refurbishment

150 mm (overall) -

Trading floors

300 - 500 mm (overall)

150 mm (overall) 100mm (overall, minimum) 300 - 500 mm (overall)

LIFTS Performance requirements: Car loading Waiting time (up-peak) Handling capacity (up-peak) Waiting time (two way lunchtime) Handling capacity (two way lunchtime) NIA per person Hall call system: Time to destination

STRUCTURAL LOADINGS Live: Ground floor and below ground office floors Above ground High load areas (over approx 5% of floor area) Dead: Partitions Car parking Loading bays Plant room Retail space Floors, Ceilings & Services SMALL POWER Loading diversified on floor distribution (based on 1 workspace per 10m²) Diversified load (1000m²)

+ 1%

3.0 kN/m²

3.0 kN/m²

2.5 kN/m² 7.5 kN/m²

2.5 kN/m² 7.5 kN/m²

0.5 - 1.2 kN/m² 0.85 kN/m²

0.5 - 1.2 kN/m² 2.5 kN/m² 5.0 - 10 kN/m² 7.5 kN/m² 4.0 kN/m² 0.85 kN/m²

25 W/m²

20 - 25 W/m²

( 5 W/ m² )

15 W/m²

13 - 15 W/m²

( 2 W/ m² )

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02 / QUICK GUIDE

2009

2014

CHANGE

2% average; 0.8% minimum

2% - 5%

+ 3%

Average Maintained Illuminance: VDU Use Paper based tasks Task Uniformity Unified Glare Rating (UGR) Electrical Load Allowance

300-500 lux 500 lux 0.7 19 12 W/m²

300-500 lux 500 lux 0.4 19 10 W/m²

(0.3)

Lighting Energy Use

(Incl. task lighting & CAT B allowance) 15-30 kWhr/m²/yr

(Incl. task lighting & CAT B allowance) 12-22kWhr/m²/year

Not more than 3.5m³/ hr/m² for building at 50pa

Not more than 3.5m³/hr/m² for building at 50pa Not more than 7m³/ hr/m² for building at 50pa 12-15 l/s per person

LIGHTING Daylighting (target)

COMFORT Airtightness

Airtightness - naturally ventilated buildings Outdoor air

12-16 l/s per person

Occupancy

1 Workspace per 10 m² 1 Workspace per 8 - 10 m²

Air conditioned space: Summer Winter Mixed Mode/Natural Vent: Summer

Winter

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24°C ± 2°C 20°C ± 2°C

24°C ± 2°C 20°C ± 2°C

Not to exceed 25°C for more than 5% of occupied hours. Not to exceed 28°C for more than 1% of occupied hours 20°C ± 2°C

Not to exceed 25°C for more than 5% of occupied hours. Not to exceed 28°C for more than 1% of occupied hours 20°C ± 2°C

( 2 W/ m² )

(3-7k Whr/m²/ yr )

( 1 I/s per person) ( 2m² )

02 / QUICK GUIDE

2009

2014

CHANGE

NR40 (Leq) NR38 (Leq) NR35 (Leq)

NR40 (Leq) NR38 (Leq) NR35 (Leq)

NR 40 NR 38 NR 35

NR 40 NR 38 NR 35

Minimum: ‘Very Good’ Best Practice: ‘Excellent’

Minimum: ‘Excellent’ or ‘Very Good’. Best Practice: ‘Outstanding’

NOISE CRITERIA External Noise Intrusion: Open Plan Speculative Cellular Offices Building Services: Open Plan Speculative Cellular Offices SUSTAINABILITY BREEAM 2008 Rating for new & refurbished offices

Note: The cells marked ( - ) indicate that data of that detail was not included within the publication

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GARDINER & THEOBALD LLP 10 South Crescent, London, WC1E 7BD gardiner.com BCO SPECIFICATION FOR OFFICES 2009-2014