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Re: Min area reinforcement in walls

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Mark:
 
If your walls act in pure compression, ACI 318-99 14.3.2 and 14.3.3, 0.0012 vertical and 0.0020 horizontal for welded wire fabric. You can also use 14.2.7 where thickness and reinforcement limits may be waived if structural analysis shows adequate strength and stability.
 
Regards,
 
Walter E. Sheen
Civil Engineer
Lima - Peru
(511) 446-6237  (511) 446-9407
wsp(--nospam--at)terra.com.pe
----- Original Message -----
Sent: Wednesday, October 17, 2001 10:29 PM
Subject: Min area reinforcement in walls

I am designing a hotel using reinforced concrete cast insitu walls and floors. The building is four storeys high and walls are 12 foot on centres with cross walls 20ft on centres so that the building is very rigid in both directions. The walls act in pure compression and are 6" th..According to BS 8110, the min area of rein in a reinforced wall is 0.4% Ac. However I interpret that to apply to doubly reinforced walls. For a singly reinforced wall is there an standard for a lower percentage of minimum reinforcement. I am using a single layer of pre-welded reinforcing mesh.
 
Thank You
Mark Francois