Of poured roof deck in oak ridge tennessee was for the manhattan project.
History of gypsum roof deck.
Venting lwic installed over structural concrete and other non venting substrates.
Only gravity load and wind uplift loads were considered.
In the 1950 s new construction methods came in the way of new types of roof decking and dead level roof systems.
This was a cost effective way of construction back then and today.
Nrdca 600 guideline for application of cementitious wood fiber roof deck systems.
1946 a new name.
The gypsum roof deck system is supported by bulb tees generally spaced from 24 to 32 on center.
Metal roof decking and gypsum roof decks were more prevalent and required a roof insulation overlay.
Using the roof deck as a structural diaphragm was a california development and worked its way across the nation in the late 1950 s and early 60 s.
Galvanized wire mesh removing deteriorated gypsum deck 4.
These include office complexes schools public buildings shopping malls and warehouses located throughout the united states.
Light in weight of proven strength rapidly erected quick to set fire resistive heat non conducting condensation minimizing united states gypsum company world s largest.
Picture story of gypsum roof deck repair sequence.
Nrdca gypsum roof deck repair replacement procedure.
Many of these installations continue to perform and provide support to roofing materials that have been added over time.
Therefore many poured gypsum roof decks were not designed and installed with diaphragm shear strength in mind.
This system provides fire resistance seismic and wind load diaphragm values in addition to an economical roofing membrane substrate.
With its combination of fire resistance strength and dimensional stability industry professionals count on densdeck roof boards to enhance the performance of their roofing systems.
Gypsum concrete roof deck system.
History gypsum cast over formboards and structurally supported by bulb tees or truss tees was introduced as a roof deck substrate in the 1940 s.
It was not until 2 years later in 1945 that we knew the 2 500 000 sq.
Deteriorated gypsum deck deck repair sequence 2.
Including a high performance roof board in your roofing system is essential to the protection of the building and the valuable contents inside.
Cutting section from deck.
Full text of pyrofill monolithic gypsum roof deck see other formats s 7 gypsum roof deck 1 n economical form of poured in place construction that is adaptable to compar atively long spans and provides roofs that are.
Gypsum concrete roof deck systems have been installed since the early 1950 s in all types of commercial markets.
