Protection of Reinforcement

[ron]

Section 714.2.5 2006 IBC

Addresses the thickness of protection for masonry reinfocement but where in code does it give you the required thickness for protection of structual reinforcement in a masonry wall ?

I'm not speaking of coverage tables ( ACI- 318) but for fire protection since chapter 7 is speaking of Fire Resistance contruction. Table 720.1 does not address structual masonry walls.

 

[Glennman CBO]

ron,

The section you referenced only states how to measure the covering's thickness, and gives allowance for stirrups. I found cover requirements for reinforcement in reinforced concrete masonry lintels and masonry lintels in sections 721.3.4, and 721.4.1, but not for reinforcement in walls. Did you try ACI 530? I don't know alot about masonry, but I would think that if they have the same cover as for lintels, that would "cover" it (pun intended).

Let us know what you find out, as I'm curious.

 

[ron]

ACI-530 doesn't address it all it does is refer you to the IBC. I spoke with UL and they could only tell me that the concrete protecting the reinforcement must withstand up to 800 degrees what ever that thickness that is.

 

[north star]

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See if the attached link will help you any [ ACI-216.1-07 / TMS-0216-07 ].

http://www.ccmaonline.com/pdf/sect2b.pdf

The reference to ACI-216 is in the back of the IBC, at "Referenced Standards".

* * *

 

[Mark K]

With reinforced masonry you always get the face shell plus at least 1/4" grout, Ref Section 1.13.3.5 ACI 530-05.

Given the nature of the voids it is not as eady to control the cover like you can do in concrete.

I am not aware of any cover requirement for fire.