STRETCHER BOND versus STACKED BOND - Concrete Masonry Units, STACKED BOND, RUNNING BOND, STRETCHER BOND

Posted by jlsmartover 3 years ago

STRETCHER BOND versus STACKED BOND

In PROFIS, the only choice given for the substrate for the design of anchors in the face of a grout-filled concrete masonry wall is "STRETCHER BOND". ESR-4143, for HIT-HY 270, makes no mention of the whether the wall is laid in running or stacked bond. Am I missing something, or is this just a peculiarity of the software?

Concrete Masonry Units,STACKED BOND,RUNNING BOND,STRETCHER BOND

2 Replies

Posted by Samantha Burtover 3 years ago

Hilti Verified

Hello,

Hilti anchor tests were performed in stretcher bond and therefore, the ICC ES Reports and PROFIS Engineering only provide data for this condition. It'll be up to engineering judgement if the Engineer of Record would like to use this data as a guideline in stack bond applications. Onsite testing might also be considered to verify anchor performance.

Best,
Sam

1 comment on this reply

Posted by jlsmartover 3 years ago

I think you may be missing the point of my question. Contrary to your response, the ESR makes no mention of the masonry bond pattern, at least not that I can see. The ESR is the legal document that spells out the requirements for using the described product as an alternative to cast-in-place anchors and it simply does not require running or stretcher bond. A number of other ESRs for post-installed masonry anchors do stipulate running bond, but ESR-4143 does not.

Posted by Emily over 3 years ago

Hilti Verified

Hi,

The previous Hilti response did not claim or state that the ESR contains stretcher bond information. The previous response is providing information not included in ESR-4143 -- that Hilti anchor tests were performed in a stretcher bond configuration. Therefore, all the data for HIT-HY 270 into masonry is based off of testing into stretcher bond; Hilti does not have testing into a stacked bond.

Regards,
Emily

Masonry,profis engineering,STACKED BOND,STRETCHER BOND

1 comment on this reply

Posted by jlsmartover 3 years ago

Okay, if the testing was limited to running bond. The program limits designs to running bond. Shouldn't the ESR, also state that the CMU must be laid in running bond? I'm not trying to belabor this questions, but I could design something in strict conformance with the ESR and you seem to be saying that it might be unconservative.