structeng2
Structural
- Apr 18, 2016
- 38
Hello Everyone,
I am trying to determine proof loads for some post-installed epoxy anchors using Hilti HIT-RE 500 V3 epoxy. Previously I had found this documentation from OSHPD from 2008 (which seems to be an interpretation of the CBC):
I recently reached out to Hilti for their recommendation on it and received this recently revised segment of AC308 13.3.4:
To me, the requirements from AC308 make more sense but do not account for other possible limiting factors in the design(e.g. concrete break-out strength could control over bond strength).
What is the industry standard for proof load testing? What do you guys spec for proof loading? Thanks in advance.
Peter
I am trying to determine proof loads for some post-installed epoxy anchors using Hilti HIT-RE 500 V3 epoxy. Previously I had found this documentation from OSHPD from 2008 (which seems to be an interpretation of the CBC):
Test loads should be greater of 2x maximum allowable tension load or 1.5x max design strength of anchors. But should not exceed 80% of nominal yield strength of anchor (0.8*Fye*Ase).
I recently reached out to Hilti for their recommendation on it and received this recently revised segment of AC308 13.3.4:
Test loads shall not exceed the lesser of 67% of the bond strength (uncracked concrete and accounting for edge distance and embedment) or 80% of the nominal yield strength of the anchor.
To me, the requirements from AC308 make more sense but do not account for other possible limiting factors in the design(e.g. concrete break-out strength could control over bond strength).
What is the industry standard for proof load testing? What do you guys spec for proof loading? Thanks in advance.
Peter
