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RE: Shear Wall ACI 318

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I have a question on concrete shearwalls. ACI 318 chapter 14 cl 14.3.7 says 
 that you must provide 2No. 5 bars around all window and door openings in 
addition to the minimum reinforcement.  I find this an overkill for shearwalls 
 less that 6" thick with a single layer of reinforcement. Such walls are 
commonly used in dormitory , apartment and hotel room construction that there 
 is great difficulty getting cover at these locations. I can see the requirement 
 for a wall with two layers but not with one , has anyone looked at this 
issue before?

Director BBFL Caribbean Limited

Head Office: 213 Belmont Circular Road, Belmont, Port-of-Spain, Trinidad & 
Tobago T + (868) 623 0789 ext. 248 F + (868) 624 9938
E info(--nospam--at)

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-----Original Message-----
From: seaint-seaosc(--nospam--at) [mailto:seaint-seaosc(--nospam--at)] On 
Behalf Of Bill Polhemus Sent: Friday, May 9, 2014 6:02 PM
To: seaint-seaosc(--nospam--at)
Subject: Re: [SEAINT-SEAOSC] SMACNA Manual

Check your email.

William L. Polhemus, Jr. P.E.


> On May 9, 2014, at 4:39 PM, "Thor Tandy" <vicpeng(--nospam--at)> wrote:
> Hi
> I'm looking for the "Ip" factor for ducting seismic load calcs.  We
> don't have that factor here unless it's an importance factor but it is
> in ASCE-7 to which the SMANCNA manual pledges loyalty.
> I don't have a copy of ASCE-7 so would a kind soul, pretty please, be
> able to send me the appropriate clauses etc for ducting calcs?
> Thor A. Tandy P.Eng, C.Eng, Struct.Eng, MIStructE, FEC Victoria, BC
> Canada
> Email:  <mailto:vicpeng(--nospam--at)> vicpeng(--nospam--at)
> hst_ngc4414_9925Please consider the environment before printing out
> this

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