Ul 521 Floor Assembly

Use of floor ceiling designs for roof ceiling or reverse.

Ul 521 floor assembly.

Here we present the components of fire rated ul designs for wood framed floor ceilings and the requirements needed for meeting sound control per section 1207 of the international building code ibc. Floor topping thickness shall be a min of 1 in. Floor topping mixture bearing the ul classification marking as to fire resistance with a minimum compressive strength of 1500 psi. Finish rating 91 or 98 min.

See floor and roof topping mixtures ccox category for names of classified companies. 25mm hacker industries inc type firm fill scm 250 quiet qurl 55 025. Ul standard ul 521 edition 7 standard for heat detectors for fire protective signaling systems edition date. Floor mat materials optional floor mat material nom 1 8 in.

For the most up to date information or assembly options refer to the ul fire resistance directory. 6mm thick loose laid over the subfloor. One layer 5 8 thick gypsum board ul type ulix assembly ul design no. 32 mm hacker industries inc firm fill scm 400 quiet qurl 60 040 alternate floor mat materials optional floor mat material nom 3 4 in.

19 mm thick loose laid o ver the subfloor. Ul bxuv guideinfo section iii 19 includes the following. See item 6 this design was evaluated using a load design method other than the. Floor topping thickness shall be a min of 1 1 4 in.

Class a b or c prepared roof coverings may be used on wood floor designs without a reduction of the fire resistance rating provided a nailer of equal thickness to the length of the mechanical fasteners is added to the flooring. Discover monokote products ul designs thickness and more about floor assemblies. Estimated range of acoustical performance is based on laboratory test data of similarly constructed assemblies. Floor topping thickness shall be a min of 1 1 2 in.

February 19 1999 ansi approved. Refer to the ul fire resistance directory for information regarding product orientation and fastening requirements. For the most up to date fire resistance ratings refer to the ul online certifications directory ul l521. L521 system 4 notes.

Floor topping thickness shall be a min of 3 4 in. M521 november 13 2019 unrestrained assembly rating 2 hr.