Diaphragm comprised of wood structural panels as flexible.
Floor diaphragm design. Structures using wood frame shear walls or wood frame diaphragms to resist wind seismic or other lateral loads shall be designed and constructed in accordance with af pa sdpws and the applicable provisions of sections 2305 2306 and 2307. The term diaphragm is usually applied to roofs and floors. 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. Because the lightweight concrete floor topping is discontinuous at each partition and wall it is not considered to be a structural diaphragm.
Design requirements for aac floor diaphragms are not given in the 2005 msjc code and specification because that can be applied to many different types of floor systems the design procedure given here is based on the requirements of the icc es 215 evaluation report which was developed based on research at the university of texas at austin. Diaphragms are usually constructed of plywood or oriented strand board in timber construction. Seismic design category b c d e or f of the international building code ibc 2009 referred to here as the ibc. A shear wall however is a vertical cantilevered diaphragm.
Vice president and director of research and development john a. Metal deck or composite metal deck in steel construction. These construction systems can be used when designing a building for lateral loads such as those generated by wind or earthquakes. 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.
Floor diaphragms in timber buildings presents designs for flexible and rigid diaphragms including structural elements and connections. Comprising horizontal spanning elements diaphragms vertical spanning elements walls and frames and foundation. It covers the terminology concept and design of timber diaphragms as well as a design example. The program is based on the steel deck institute sdi diaphragm design method and incorporates the latest icc es ac43 performance data.
Seismic design of floor diaphragms 373 373 chapter 8 seismic design of floor diaphragms farzad naeim ph d s e. Martin associates los angeles california. The hilti profis df diaphragm software version 2 0 calculates diaphragm shear flexibility factors and uplift resistance for steel deck roof and floor systems.
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