Poured Gypsum Roof Deck Weight

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.

Poured gypsum roof deck weight.

Densdeck roof boards are easy to. The westford ma based national roof deck contractors association has published guidelines for rehabilitation of old gypsum 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. 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.

Gypsum decks incorporated the placement of bulb tees. 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. For fire rated roof decks weld per fire test assembly. Many of these installations continue to perform and provide support to.

Poured gypsum decks provide stable structural properties if kept moisture free. Use minimum 13 mm 1 2 inch fillet welds on alternate sides of sub purlins both sides at end joints to main purlins. Place plank on lower flanges of sub purlins or other framing with ends and edges supported. Tectum 1 thick 2 0psf insulrock 1 thick 2 7psf poured gypsum 1 thick 6 5psf vermiculate concrete 1 thick 2 6psf.

It is usually poured to a 2 inch thickness and weighs approximately 17 5 lbs. These include office complexes schools public buildings shopping malls and warehouses located throughout the united states. 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. Bulb tees are high strength lightweight steel sections.

Its use increased since it provided roof deck fire protection diaphragm values and an economical substrate for roofing. Gypsum concrete roof deck systems have been installed since the early 1950 s in all types of commercial markets. Gypsum poured over formboards has been used as a substrate for roofing materials since the 1940 s. Keydeck woven wire mesh is commonly used in repair of poured gypsum roof decks.

Gypsum concrete roof deck system.