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## Chapter 22 Structural Collapse ### 1. Noises - Creaking or groaning sounds are often heard in wood buildings as movement occurs. - Cracking timbers may also be audible. - Deep rumbling noises may sometimes be heard accompanying partial collapses in remote areas of the structure. ### `12.` Pla...

## Chapter 22 Structural Collapse ### 1. Noises - Creaking or groaning sounds are often heard in wood buildings as movement occurs. - Cracking timbers may also be audible. - Deep rumbling noises may sometimes be heard accompanying partial collapses in remote areas of the structure. ### `12.` Plaster sliding off the walls or plaster dust hanging in the air - Plaster is applied over a lath that is held rigidly to the structure, the plaster itself is not. - When shifting occurs on the wall, the plaster may be wiggled off in fairly large chunks. - If plaster dust is evident in an area that has otherwise been untouched, suspect that subtle movement of the structure is taking place. - This may be further indicated by windows that suddenly crack on their own or doors that swing by themselves. - The distortion of the door and window frames is the result of being pushed over. - This is prevalent in Class 5 construction, wood-frame buildings.