Fire resistance is the ability of an assembly constructed in a laboratory to contain a fire in a carefully controlled test setting for a specified period of time.

Our range of drawings can help pros plan projects more effectively by utilizing designs for a fire-rated ceiling assembly. When floor-ceiling assemblies are used to plot our UL floor-ceiling assemblies and fire-rated floor assemblies, you can ensure the accuracy of your next project.

use of UL Certified products, equipment, system, devices, and materials. Authorities Having Jurisdiction should be consulted before construction. Fire resistance assemblies and products are developed by the design submitter and have been investigated by UL for compliance with applicable requirements.

Fire-RatedFire-resistance ratings have long been used by UL, ASTM and building codes to measure the performance of various constructions for fire containment purposes. As applied to elements of buildings, the fire-resistance rating classifies the ability of an assembly

UL design L501 permits option of Floor Topping Mixture over plywood. 1/2" (12.7 mm) Fire-Shield C Gypsum Wallboard or 1/2" (12.7 mm) Fire-Shield C Kal-Kore plaster base screw attached to Resilient Furring Channels spaced 24" o.c. (610 mm) on 2 x 10 (38 mm x 241 mm) wood joists 16" o.c. (406 mm).

Title: UL Design No. L501 Author: Powers Created Date: 3/26/2007 12:49:18 PM

Sep 16, 2020 · We provide training, advisory, testing, Verification, inspection and certification services for the fire resistance industry to help you get compliant products to the market faster.

Our clients rely on this certification to demonstrate compliance with regulations and ensure the reliability of our products in their projects.

In these tests, we directly applied one or two layers of 5/8-inch-thick fire-rated gypsum board or 1/2 inch-thick southern pine plywood for the protective mem brane to the wood element.

Feb 9, 2021 · For occupancies such as stores, apartments, offices, and other commercial and industrial uses, building codes commonly require floor/ceiling and wall assem-blies to be fire-resistance rated in accordance with standard fire tests.