To address these requirements, MBMA conducted fire tests at Underwriters Laboratory (UL), Intertek, and FM Global that showed metal buildings can easily comply with one- and two-hour fire-rating requirements. Use the table below to find fire protection details that meet your needs.

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

Any 5/8 in. thick UL Classified Gypsum Board that is eligible for use in Design Nos. L501, G512 or U305. Nom 1/2 in. or 5/8 in. thick gypsum board. Applied in layers as noted in the above illustrations. Boards are to be applied vertically without horizontal joints.

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.

um board enclosures, such as UL Design No. X524. However, a recent study, sponsored by the Metal Building Manufacturers Association (MBMA), determined that it is also feasible to use other common materials such as spray-applied fire re.

2019年8月29日 · When fire protection of metal building frames is required by the building code, the assemblies have historically been gypsum board enclosures, such as UL Design No. X524. For this study, 180 single-story metal building designs that varied in span length, roof slope and location in the continental United States were tested.

bearing the UL Classification Marking as to Fire Resistance. See Floor- and Roof-Topping Mixtures (CCOX) category for names of Classified Companies. Refer to the manufacturer’s instructions accompanying the material and/or contact …

This new assembly, known as UL W404 contains several prominent attributes and increases the total number of fire resistive assemblies sponsored by MBMA to 13. UL W404 preserves the most common and efficient metal building system construction practices of the industry in this new 1-hr non-loadbearing exterior wall system.

2019年10月2日 · 4A, any 2-1/2 in., thick glass fiber batt material bearing the UL Classification Marking as for Fire Resistance, glass fiber batt to be compressed to completely fill the cavity between the Furring Channels. See Batts and Blanket (BZJZ) …

2013年3月26日 · The MBMA fire tests of exterior walls in 1997 resulted in a new UL Design, No. V421, which provides 1 and 2-hour fire resistance ratings for exterior walls in metal buildings. The ratings are for unsymmetrical walls that require ratings from both sides.