While the use of brick veneer supported by Metal Plate Connected Wood Trusses (MPCWT) is not covered by the prescriptive methods of either the International Building Code (IBC) or the IRC, code compliant use of MPCWT to support brick veneer can be accomplished and can be applied to many different situations utilizing MPCWT’s. This guide focuses specifically on creating a code compliant connection where exterior masonry veneer is located on the gable end at the transition from a wider section of a building to a narrower section.
- The IRC 2015 includes no prescriptive provisions to specifically address an exterior brick veneer wall supported directly by MPCWT
- Code compliance can be accomplished by both individual designs and by adhering to the guidance in this presentation
- This presentation specifically focuses on masonry veneer supported by MPCWT on the gable end at the transition from a wider section of a building to a narrower section
- However, the concepts shown can be applied to many different situations utilizing trusses
- The detail below may be referred to by the building designer to achieve a code-conforming steel lintel connection
- Steel Angle - minimum 6” x 4” x 5/16”, full length of supporting roof section
- Stops welded by others (if required)
- 2x_ nailer to support sheathing of the adjacent roof
- 2x6 lumber reinforcement
- 16d nails
- Veneer ties
- Wood Structural Sheathing
- Other materials as specified by the Building Designer
Attach Nailer and Roof Sheathing
- Attach 2x_ nailer to support sheathing of the adjacent roof with 16d nails @ 12” o.c. scattered
- Apply roof sheathing to nailer and adjacent roof trusses
- Attach 2x6 lumber reinforcement parallel with steel shelf angle.
- Attach steel angle as specified by the building designer
- Leave 1” minimum clearance between the angle and lower roof deck to facilitate further roofing replacement and/or re-roofing
Flashing and Weep Holes
- Apply counter flashing, step flashing, and weep holes in the brick veneer wythe directly above the steel angle
- Weep holes shall be spaced a maximum of 33” o.c.
- Attach veneer ties at maximum 32” o.c. horizontally and 24” o.c. vertically to support a maximum of 2.67 sq. ft. of brick veneer wall area
- Install masonry veneer as shown
Vertical Expansion Joints
- Add vertical expansion joints at a maximum of 25’ o.c.
- Expansion joints are typically sized similar to a mortar joint, usually between 3/8” and 1/2”
- Vertical expansion joints should be considered with:
- Wall intersections
- Changes in the wall height
- Brick veneer support changes
- Wall function or climatic exposure changes