| 9.20.11. |
Anchorage of Roofs, Floors and Intersecting Walls |
| 9.20.11.1. |
Anchorage to Floor or Roof Assemblies where Masonry Walls Require Lateral Support
- Where required to receive lateral support (see Subsection 9.20.10.), masonry walls shall be anchored to each floor or roof assembly at maximum intervals of 2 m, except that anchorage to floor joists not more than 1 m above grade may be omitted.
- Anchors required in Sentence (1) shall be corrosion-resistant and be not less than the equivalent of 40 mm by 4.76 mm thick steel straps.
- Anchors required in Sentence (1) shall be shaped to provide a mechanical key with the masonry and shall be securely fastened to the horizontal support to develop the full strength of the anchor.
- When joists are parallel to the wall, anchors required in Sentence (1) shall extend across not less than 3 joists.
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| 9.20.11.2. |
Bonding and Tying Intersecting Masonry Walls where Walls Require Lateral Support
- Where required to provide lateral support, intersecting walls shall be bonded or tied together.
- Where bonding is used to satisfy the requirements of Sentence (1), 50% of the adjacent masonry units in the intersecting wall, distributed uniformly over the height of the intersection, shall be embedded in the laterally supported wall.
- Where tying is used to satisfy the requirements of Sentence (1), the ties shall be
- corrosion-resistant metal,
- equivalent to not less than 4.76 mm by 40 mm steel strapping,
- spaced not more than 800 mm o.c. vertically, and
- shaped at both ends to provide sufficient mechanical key to develop the strength of the ties.
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| 9.20.11.3. |
Anchoring Intersecting Wood-Frame Walls to Masonry Walls
- Wood-frame walls shall be anchored to masonry walls that they intersect with not less than 4.76 mm diam corrosion-resistant steel rods spaced not more than 900 mm o.c. vertically.
- Anchors required in Sentence (1) shall be fastened to the wood framing at one end and shaped to provide a mechanical key at the other end to develop the strength of the anchor.
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| 9.20.11.4. |
Anchoring Wood-Frame Roof Systems to Masonry Walls
- Except as permitted in Sentence (2), roof systems of wood-frame construction shall be anchored to exterior masonry walls by not less than 12.7 mm diam anchor bolts,
- spaced not more than 2.4 m apart,
- embedded not less than 90 mm into the masonry, and
- fastened to a rafter plate of not less than 38 mm thick lumber.
- The roof system described in Sentence (1) is permitted to be anchored by nailing the wall furring strips to the side of the rafter plate.
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| 9.20.11.5. |
Anchoring Masonry Cornices, Sills and Trim to Masonry Walls
- Cornices, sills or other trim of masonry material which project beyond the wall face shall have not less than 65% of their mass, but not less than 90 mm, within the wall or shall be adequately anchored to the wall with corrosion-resistant anchors.
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| 9.20.11.6. |
Anchoring to Masonry Piers
- Where anchor bolts are to be placed in the top of a masonry pier, the pier shall conform to the requirements of Sentence 9.15.2.3.(4) and shall be capped with concrete or reinforced masonry not less than 200 mm thick.
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