Concrete Floor Slab Fire Rating

Fire endurance of structures figure 5 shows the effect of fire on the resistance of a simply supported reinforced concrete.

Concrete floor slab fire rating.

The duration of time that an element such as beam column wall floor or roof can endure. Fire resistance rating or fire rating is defined as the duration of time that an assembly roof floor beam wall or column can endure a standard fire as defined in astm e 119 3. Concrete masonry is widely specified for fire walls and fire barriers because concrete masonry is noncombustible provides durable fire resistance and is economical to construct. Fire resistance of concrete is the ability of concrete to withstand fire or to give protection against fire.

This guide pretty much excludes me from using the 4 5 slab as a 2 hour rating by itself. Chapter 7 of the international building code ibc refs. Verco ul floor 1 november 2019 verco composite non composite deck verco formlok composite and vercor non composite slabs may be used to meet hourly fire ratings. The corrected thickness of finish shall then be added to the actual or equivalent thickness of concrete and fire resistance rating of the concrete and finish determined from tables 722 2 1 1 and 722 2 1 2 1 and figure 722 2 1 2.

1 877 4ad mix1 1 877 423 6491. This table is based on the crsi reinforced concrete fire resistance manual. Or what fire proofing would be required to supplement the concrete flooor. Table d 2 2 1 b minimum concrete cover over reinforcement in concrete slabs mm type of concrete fire resistance rating.

The type and thickness of concrete specified will generally determine whether fireproofing will be required on the underside of the formlok or vercor deck. This involves the ability of concrete structural element to continue perform a specific structural function or confine fire or both. Does anyone know of a ul listing of floor slab thicknesses fire ratings. E quation 6 is used to compute the fire resistance of precast concrete wall panels constructed from two layer of concrete between which a layer of foam plastic is sandwiched.

The insulation depth depends on the type of profile and it is the concrete cover to the main crest of the deck for trapezoidal profiles and the full slab depth for re entrant profiles. Structural function or both. 4 where the top layer of a 2 layer slab is less than 25 mm thick the fire resistance rating for the slab shall be calculated as though the entire slab were made up of the type of concrete with the lesser fire resistance.