Transcription of 4.5 Procedures for Diaphragms - Memphis
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4.5 Procedures for Diaphragms - Memphis
For DiaphragmsThis section provides Tier 2 evaluation Procedures thatapply to Diaphragms : general, wood, metal deck,concrete, precast concrete, horizontal bracing, andother 4-27. Diaphragm as a BeamFigure 4-28. Chord SectionsChapter - Evaluation Phase (Tier 2)4 - 70 Seismic Evaluation HandbookFEMA 310 Commentary: Diaphragms are horizontal elements that distributeseismic forces to vertical lateral force resistingelements. They also provide lateral support forwalls and parapets. Diaphragm forces are derivedfrom the self weight of the diaphragm and theweight of the elements and components that dependon the diaphragm for lateral support. Any roof,floor, or ceiling can participate in the distributionof lateral forces to vertical elements up to the limitof its strength.
the presence of any drag struts. The adequacy of the walls to span out-of-plane between points of anchorage shall be evaluated and the adequacy of the diaphragm connections to resist wall out-of-plane forces shall be evaluated. Figure 4-33. Opening at Exterior Wall Chapter 4.0 - Evaluation Phase (Tier 2) FEMA 310 Seismic Evaluation Handbook 4 - 73
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