Gypsum Roof Decking

The gypsum roof deck system is supported by bulb tees generally spaced from 24 to 32 on center.

Gypsum roof decking.

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. Keydeck woven wire mesh is commonly used in repair of poured gypsum roof decks. The gypsum concrete which spans tee to tee encases the tees and. If one is considering mechanically fastening a base.

Formboards placed between the bulb tees contain the fast. 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. 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. These include office complexes schools public buildings shopping malls and warehouses located throughout the united states.

Gypsum concrete roof deck system. Densdeck roof boards are easy to. Place plank on lower flanges of sub purlins or other framing with ends and edges supported. Gypsum deck from underneath.

Picture story of gypsum roof deck repair sequence nrdca 600 guideline for application of cementitious wood fiber roof deck systems technical bulletin 1001. 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. Bulb tees are high strength lightweight steel sections. Use minimum 13 mm 1 2 inch fillet welds on alternate sides of sub purlins both sides at end joints to main purlins.

Introduced as a roof deck substrate in the 1940 s. The top of the metal banded material will look like white sheet rock. Venting lwic installed over structural concrete and other non venting substrates. Gypsum deck plank for roof decks.

The bulb tees which are very strong vertically but quite flexible horizontally provide the long span strength. The sustainable design has earned independent certification from scientific certification systems. For fire rated roof decks weld per fire test assembly. Old bald asphalt roof over wet fiberboard over asphalt felts and the white is a gypsum deck.

This system provides fire resistance seismic and wind load diaphragm values in addition to an economical roofing membrane substrate.