Gypsum Concrete Roof Deck Construction

Formboards placed between the bulb tees contain the fast setting poured gypsum roof deck.

Gypsum concrete roof deck construction.

The gypsum roof deck system is supported by bulb tees generally spaced from 24 to 32 on center. According to fields corp the compressive strength of the gypsum is 500 psi. Usg securock brand gypsum concrete patch is mill formulated and composed of specially calcined gypsum and wood chips or shavings. Many of these installations continue to perform and provide support to roofing materials that have been added over time.

The only cementitious structural panel approved by factory mutual fm fm approval standard 4472. You may also check out our complete list of companies. Gypsum concrete roof deck systems consist of a form board wire reinforcement and a poured application of gypsum concrete. I have generally seen the tees spaced about 30 to 36 on center.

This system provides fire resistance seismic and wind load diaphragm values in addition to an economical roofing membrane substrate. These include office complexes schools public buildings shopping malls and warehouses located throughout the united states. Formerly known as pyrofill gypsum concrete securock brand gypsum concrete patch is a high performing gypsum patch solution that delivers a professional finish on a variety of poured roof decks. If the deck is sound it may be possible to treat the deck much like concrete by priming the surface adhering thermal insulation and installing a new roof membrane.

Gypsum concrete roof deck system. Typcally the poured gypsum deck is about 2 to 3 thick not 1 2 as you previously mentioned and is supported by bulb tees. Venting lwic installed over structural concrete and other non venting substrates. This is similar to using floor underlayments as the subfloor base for the floor covering.

Usg securock gypsum concrete patch is noncombustible and used in several ul approved roof deck systems. It is mixed at the jobsite with clean water only and poured in place as a patch for existing gypsum decks. In cincinnati columbus dayton southern ohio the blue book building and construction network. Exceptional strength excellent fire performance and the versatility to patch many decks such as gypsum roof decks.

Introduced as a roof deck substrate in the 1940 s. A concrete roof deck that can be combined with other noncombustible materials to create 1 and 2 hour fire rated roof ceiling assemblies. Picture story of gypsum roof deck repair sequence nrdca 600 guideline for application of cementitious wood fiber roof deck systems technical bulletin 1001. Gypsum concrete roof deck systems have been installed since the early 1950 s in all types of commercial markets.