Diaphragm action
Diaphragm action
(OP)
I am working on a housing scheme which consists of 2 story small buildings which are all repetitive. The scheme is to use precast planks(may be hollowcore or solid)resting on load bearing wall panels (External are sandwich panels). To speed up the work, client is suggesting to remove/minimize the wet work on site specially the screed or topping on precast slab panels. We need topping for diaphragm action in design. Although, we are not in a seismic zone, but for Code's minimum notional loads and/or wind we need screed to horizontally transfer the loads.
The question is can we get rid of screed/topping on precast slab panels on site?. Is there any alternative way (probably with steel light members integrated with precast panels to get the diaphragm action?
The question is can we get rid of screed/topping on precast slab panels on site?. Is there any alternative way (probably with steel light members integrated with precast panels to get the diaphragm action?
IR






RE: Diaphragm action
Usually the amin thing to be concerned with is the shear stress in the keyways. PCI has several items available regarding the design of untopped precast as a diaphragm.
RE: Diaphragm action
However, with most prestressed elements you have camber - sometimes significant - and the topping allows you to have a flat surface.
Not sure I'd want to provide a cambered floor to a client. Maybe for a roof.
RE: Diaphragm action