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RE: RE: Masonry reinforcing

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This would provide reinforcing for the interior face to resist windward wind
loads but not for the exterior face to resist leeward loads which is the
controlling load for component and cladding loads.

-----Original Message-----
From: bob.ross(--nospam--at)wgint.com [mailto:bob.ross(--nospam--at)wgint.com]
Sent: Wednesday, October 03, 2001 6:36 PM
To: seaint(--nospam--at)seaint.org
Subject: Re: RE: Masonry reinforcing


Can one saw cut a recess into the CMU wall and insert the reinforcing 
bars desired and then cement grout, patch and fill the recess closed?

Pax En Christi
Bob Ross
Robert P. Ross, P.E.
Project Engineer
Washington Group International,Inc.
Industrial Processes
17320 Red Hill, Suite 300
Irvine, Ca. 92614 
Mobile 562-254-4604
Office 949-222-3978
FAX 949-222-3985
E-mail: Bob.Ross(--nospam--at)WGINT.com

----- Original Message -----
From: Tom Allen <Allen(--nospam--at)3DI.com>
Date: Wednesday, October 3, 2001 8:07 am
Subject: RE: Masonry reinforcing

> The 97 UBC section 2104.5 and associated sections will tell you 
> what the
> requirements are.  Since the cells which contain rebar are solid 
> grouted,there is no way to add additional bars and make it conform 
> to code.
> 
> -----Original Message-----
> From: Foy, Warren [mailto:Warren.Foy(--nospam--at)mhgrp.com] 
> Sent: Friday, September 28, 2001 9:09 AM
> To: 'seaint(--nospam--at)seaint.org'
> Subject: RE: Masonry reinforcing
> 
> I failed to mention that there is a brick veneer on the exterior 
> side so
> there is access to only one side.
> 
> 
> 
> I have a project under construction on which the reinforcing steel 
> in the
> masonry walls have been found to have been put in incorrectly.  
> These walls
> are non-loadbearing walls subjected to 25 psf wind loads and are 
> shear wall.
> I would like to ask this forum two question concerning the intent 
> of ACI
> 530.
> 
> 1.  The dowels extending from the foundation appear to have been 
> installedcorrectly but the upper bars are in question.  Can the 
> bottom section of a
> wall be considered reinforced and analysed using chapter 7 and 8 
> of ACI 530
> and the middle and upper sections of the same wall considered 
> unreinforceto meet the criteria of chapter 6?
> 
> 2.  Chapter 8 of ACI 530 indicates required lap splices of 0.002 
> Fs db or 48
> bar diameters and developement lengths of 0.0015 Fs db or 36 bar 
> diameters.Can these lengths be reduced as a function of (As 
> provided)/(As required) as
> allowed by ACI 318?
> 
> Also, do you have any suggestion as to how to add reinforcing bars 
> in an
> existing masonry wall?
> 
> 
> 
> Warren S. Foy
> Structural Design Manager
> The Mason & Hanger Group Inc.
> 
> 
> 300 West Vine Street, Suite 1300
> Lexington, KY   40507-1814
> voice: 859.252.9980
> fax: 859.389.8870
> web: http://www.mhgrp.com 
> 
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