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Keep up to dateIndicative costs of fire protection to structural steelwork | ||||||
Fire protection period | Mineral fibre board | Gypsum board | Calcium silicate board | Cementitious spray | Intumescent spray | Ìý |
mins | £/³¾2 | £/³¾2 | £/³¾2 | £/³¾2 | £/³¾2 | Ìý |
30 | 15-20 | 20-25 | 25-30 | 10-12 | 6-9 | Ìý |
60 | 15-20 | 20-25 | 25-30 | 10-12 | 8-12 | Ìý |
90 | 15-20 | 25-30 | 30-35 | 13-15 | 17-25 | Ìý |
120 | 20-25 | 30-35 | 35-40 | 16-18 | 30-40 | Ìý |
180 | – | – | 45-60 | 20-25 | – | Ìý |
240 | – | – | 50-85 | 25-35 | – | Ìý |
Table notes | ||||||
Rates assume straightforward access and are for quantities in excess of 1000 m2. | ||||||
Rates for boarded solutions are measured as the area of box required. | ||||||
Rates for spray solutions are measured as surface area covered. | ||||||
Rates for large section work will generally be at the lower end of the range or below. | ||||||
Rates for small section work will generally be at the higher end of the range or above. | ||||||
Rates for hollow sections will usually be higher than the rates shown. | ||||||
Work at height (more than 5 m above ground level) may attract higher rates (7.5–10%). | ||||||
Intumescent rates | ||||||
These exclude blast cleaning of steelwork and primer coat, which is normally part of off-site steel preparation. | ||||||
Off-site application rates may be 50% higher than the rates above. | ||||||
Decorative top-coat sealer will add £2-3 per m2 to the rates above. | ||||||
Boarded rates | ||||||
These exclude any subsequent decoration. | ||||||
Metal-faced boarding may attract rates of £50-85 per m2. |
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