QUESTION: When are rigid steel connectors (strap anchors) required for anchoring intersecting masonry walls?

ANSWER: Rigid strap anchors are only required at the intersection of walls that both are part of the lateral-force-resisting system (shear walls), and only when unit interlock or reinforced bond beams are not part of the construction at the intersection.  Refer to the FAQ " How should intersecting masonry walls be connected?”

Rigid strap anchors should not be installed where they are not necessary, because the projecting portions of the metal strap could pose a safety hazard to persons on the project site if the projecting ends are not protected.  Lateral-force-resisting walls should be identified as such by notes on the drawings.  When required, strap anchors should be provided in accordance with MIM Detail 2/S-2.

structural detail 2

Resources:

  1. Building Code Requirements for Masonry Structures, TMS 402-13/ACI 530-13/ASCE 5-13, Masonry Standards Joint Committee (MSJC)
  2. Masonry Institute of Michigan’s Structural Masonry Details

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