Coastal Engineering, Flood Proofing a Building
Coastal Engineering, Flood Proofing a Building
(OP)
Can anyone lend any insight into a slab on grade, pre-engineered metal building design. Local code calls for a flood water depth of 4' above the finish floor elevation which will create considerable floatation uplift. My client wants to flood protect this new building with exterior walls and flood doors as part of the building design such that he can build on his site with no fill dirt required. Any thoughts regarding an economical design? (thick mass concrete floor slab, helical piers, etc?)
Thanks.
Thanks.






RE: Coastal Engineering, Flood Proofing a Building
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Also, you may want to look in "FEMA 55, Coastal Construction Manual, Third Edition", which I recently put on my website
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RE: Coastal Engineering, Flood Proofing a Building
RE: Coastal Engineering, Flood Proofing a Building
RE: Coastal Engineering, Flood Proofing a Building
The local code is based on FEMA Publication EP1165-2-314 Dec15, 1995.
The local bldg code allows a commercial building finish floor elevation below the design flood water level provided that the building is "flood proofed". The flood proofing will consist of waterproofed exterior walls and flood doors to a height which is 1' of freeboard above the design flood water elevation.
Assuming a 50'x50' (2,500 sf) building, with a water height of 5' all around the exterior perimeter, is the total flotation uplift equal to 50x50x5x62.4 = 780 kips?
If so, then the code requires a safety factor of 33% yielding an uplift pressure of 1,037 kips total.
Is this correct? If so then resisting this with a mass concrete floor slab is not very economical. (would require a thickness of nearly 3')
Thoughts?
RE: Coastal Engineering, Flood Proofing a Building
RE: Coastal Engineering, Flood Proofing a Building
278 * $100 = $27800
What is the cost of dirt work in your area?
This is a pretty simplified look at the economics.
RE: Coastal Engineering, Flood Proofing a Building
If this is for the coast and the flood zone is from tidal surge, take care in the design. The water may not just come up statically. Hence my question about break away walls. Waves can create tremenduos loads.
RE: Coastal Engineering, Flood Proofing a Building
http://www.fema.gov/library/viewRecord.do?id=1853