Plywood Roof Diaphragm

A shear wall however is a vertical cantilevered diaphragm.

Plywood roof diaphragm.

The term diaphragm is usually applied to roofs and floors. Double diagonally sheathed lumber diaphragms shall be designed and constructed in accordance with af pa sdpws. Metal deck or composite metal deck in steel construction. Scale 20 x60 horizontal diaphragm specimens were subjected to quasi static cyclic in plane displacements and dynamic in plane earthquake shaking.

In plywood diaphragms the plywood sheathing is the web of the beam and the edge framing chords are the flanges of the beam. Properties to plywood products of that stress grade. Diaphragms and shear walls are used in the lateral design of a building the structural system is termed a box sys tem shear walls provide reactions for the roof and floor diaphragms and transmit the forces into the foundation. The veneers are bonded together with synthetic phenolic pf resin set.

Gypsum board diaphragm ceilings shall be in accordance with section 2508 5. 2306 2 3 double diagonally sheathed lumber diaphragms. Structural bracing ceiling diaphragms product description ecoply structural plywood is a layered panel made from new zealand pine wood veneers manufactured by carter holt harvey plywood limited chh plywood to the requirements of as nzs 2269. 2306 2 4 gypsum board diaphragm ceilings.

Other ecoply products are also available in f111 upon request. These construction systems can be used when designing a building for lateral loads such as those generated by wind or earthquakes. Designing for openings in wood diaphragm pdf accounting for openings in shear panels diaphragms and shear walls is a code requirement ibc 2305 1 1 no code path for checking minimum size opening limit other than prescriptive design ibc 2308 4 4 1 2308 7 6 1 do you need to account for a 12 square opening in a diaphragm. F8 is the standard stress grade for ecoply products ecoply 19 mm longspan flooring and 15 mm ecoply roofing are f111 stress grade see tables 1 4 and 5.

Or a concrete slab in. Diaphragms are usually constructed of plywood or oriented strand board in timber construction. 2018 disclaimer the advice provided in this publication is general in nature and is intended as a guide only. The use of plywood as a shear resistant material is not new since the behavior of plywood sheathing used as roof and floor diaphragms has been well established by previous testing and extensive.

The diaphragm of a structure often does double duty as the floor system or roof system in a building or the deck of a bridge which simultaneously supports gravity loads. A diaphragm is a flat structural unit acting like a deep thin beam.