Poured Gypsum Roof Deck Weight

Many of these installations continue to perform and provide support to.

Poured gypsum roof deck weight. 2 2 gypsum concrete roof decking figure 2 2 2 1 gypsum concrete is mill formulated and composed of calcined gypsum and wood chips or shavings. Gypsum roof decking is then allowed to set and covered with a water tight roofing material. It is usually poured to a 2 inch thickness and weighs approximately 17 5 lbs. Free water will cause the gypsum concrete to decompose and lose structural 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. Gypsum decks incorporated the placement of bulb tees. Poured gypsum decks provide stable structural properties if kept moisture free. Tectum 1 thick 2 0psf insulrock 1 thick 2 7psf poured gypsum 1 thick 6 5psf vermiculate concrete 1 thick 2 6psf.

Densdeck roof boards are easy to. Damage that can cause loss of the structural composite strength is most likely to come from leakage of water into the roof deck from unattended roof leaks. The westford ma based national roof deck contractors association has published guidelines for rehabilitation of old gypsum decking. Gypsum poured over formboards has been used as a substrate for roofing materials since the 1940 s.

Bulb tees are high strength lightweight steel sections. One concern is deck integrity and prolonged roof leakage could corrode the wire reinforcing and leach binder to the point that an unaware person could fall through the deck. Its use increased since it provided roof deck fire protection diaphragm values and an economical substrate for roofing. Gypsum concrete roof deck system.

For fire rated roof decks weld per fire test assembly. Place plank on lower flanges of sub purlins or other framing with ends and edges supported. Use minimum 13 mm 1 2 inch fillet welds on alternate sides of sub purlins both sides at end joints to main purlins. Keydeck woven wire mesh is commonly used in repair of poured gypsum roof decks.

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.