Gypsum Roof Decking

The fiberglass mat faced noncombustible as described and tested in accordance with astm e136 nonstructural gypsum core panels provide superior fire resistance and protection from hail damage and hold up well under normal construction and maintenance foot traffic while stiffening and stabilizing roof decks.

Gypsum roof decking.

Keydeck woven wire mesh is commonly used in repair of poured gypsum roof decks. Gypsum concrete roof deck systems consist of a form board wire reinforcement and a poured application of gypsum concrete. Venting lwic installed over structural concrete and other non venting substrates. These include office complexes schools public buildings shopping malls and warehouses located throughout the united states.

The sustainable design has earned independent certification from scientific certification systems. For fire rated roof decks weld per fire test assembly. Securock brand gypsum fiber roof board s dense concentration of gypsum and cellulose fibers provides exceptional panel and bond strength low surface absorption and superior wind uplift performance with no face layer to delaminate. The bulb tees which are very strong vertically but quite flexible horizontally provide the long span strength.

Keydeck mesh is made up of 2 hexagonal mesh composed of woven 19 gauge galvanized wires with an additional 16 gauge galvanized longitudinal wire placed at every 3 interval of its width. The gypsum roof deck system is supported by bulb tees generally spaced from 24 to 32 on center. The poured gypsum roof deck consists of steel bulb tees a form board usually composed of gypsum or fiberglass wire reinforcing mesh and the gypsum concrete. Gypsum deck plank for roof decks.

Picture story of gypsum roof deck repair sequence nrdca 600 guideline for application of cementitious wood fiber roof deck systems technical bulletin 1001. Gypsum deck from underneath. This system provides fire resistance seismic and wind load diaphragm values in addition to an economical roofing membrane substrate. Densdeck roof boards are easy to.

Bulb tees are high strength lightweight steel sections. The gypsum concrete which spans tee to tee encases the tees and. Use minimum 13 mm 1 2 inch fillet welds on alternate sides of sub purlins both sides at end joints to main purlins. Old bald asphalt roof over wet fiberboard over asphalt felts and the white is a gypsum deck.

If one is considering mechanically fastening a base. 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. Formboards placed between the bulb tees contain the fast. Gypsum concrete roof deck systems have been installed since the early 1950 s in all types of commercial markets.

Introduced as a roof deck substrate in the 1940 s.