Don Vandervort, Head Homeboy, has written more than 30 DIY home improvement books, been a segment host on HGTV, served as MSN.com's home improvement expert and written countless magazine articles.
Some codes require that certain post-and-beam designs have crossbracing for lateral stability during high winds or seismic events.
Unless they have a steel or engineered structure, post-and-beam assemblies, particularly those for freestanding patio roofs, may require bracing for lateral stability.
Roofs less than 12 feet high usually require bracing on the outside posts of the side not connected to the house.
The most common type of bracing, shown below right, is called Y bracing. Mark individual braces in position, and cut them on the ground. Nail them in place temporarily. Drill pilot holes for lag screws or bolts, and then permanently affix the braces.
Post-and-Beam Connections
Y Bracing
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