This connection is used at the top of concrete masonry walls or when a change in wall thickness provides a ledge with sufficient bearing area as shown in figure 1.
Roof truss to cmu wall connection.
Walls that are constructed of concrete block that need to be covered with a roof will require the use of a ledger.
A ledger is a horizontal board that is attached to the top of the the wall.
Simpson strong tie category masonry connectors we use cookies on this site to enhance your user experience.
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Figure 4 shows a typical roof truss anchor cast into the bond beam of a concrete masonry bearing wall.
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The ledger is needed to properly attach the perpendicular roof trusses to the top of the structure.
In this article richard reynolds who helped write the new code language outlines the steps involved.
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How to inspect the connections that tie existing rafters or trusses to the wall plate to determine whether retrofitting is needed.
And if the home does need a.
In older houses with masonry walls it is common to find a 2x8 lumber plate that is bolted or strapped flat like a plate to the top of the masonry wall.
In older homes the connection may be made using 2 or 6 16d nails in a toe nail configuration.
For example wood roof to masonry wall pocket and ledger connections were used in residential masonry homes in the united states during the 1700s 1800s and 1900s and continue to perform satisfactorily.
New florida codes compel contractors to upgrade the roof wall connections on qualifying older homes when replacing the roof covering.
When the trusses are oriented parallel to the wall the simplest method of connecting a braced wall panel to the roof floor system above is to frame and sheath the wall up to the roof floor deck above and attach the roof floor sheathing to the double top plate of the braced wall panel with 6d common 0 113 x 2 0 nails at 6 on center as.
The trusses or rafters are then connected to this plate.
The required anchor load capacity depends on the design wind speed as well as the roof truss span.