Saturday, July 30, 2016

Simpson Strong Tie HRC44 Hanger Installation


This is my version of Simpson Strong Tie HRC44 Hanger Installation. Simpson website says to double bevel-cut hip rafter members to achieve full bearing capacity with HRC hangers. The HRC22 and HRC1.81 hangers for single hip rafters work correctly with a double bevel-cut on the hip rafters, so the hip rafters can intersect at the correct roof plane location point. However, the HRC44 hangers for hip rafters were not designed for double bevel-cut hip rafters. Simpson wants you to square cut the ends of the hip rafters to work "correctly" with their HRC44 hangers.  I find this very unacceptable when your installing hip rafters. 


In these pictures of the hip rafters with the HRC22 hangers you can that worked correctly with a double bevel cut on each hip rafter. 







I installed  HRC44 hangers about 5 years ago and don't remember how I got the HRC44 hanger to work with double bevel-cut 4x10 hip rafters. I must have beat the hanger into place or I cut the double bevel cuts differently or square. 







This time I cut some 4x6 blocks with a double bevel cut with zero pitch to determine what I needed to do to correct the installation of the hip rafters into the HRC44 hanger. 







With a 1/2" gap at the back of the HRC44 hanger with double bevel cut hip rafters I decided that notching the ridge beam an 1/2" would allow me to install the hip rafters into the HRC44 hangers with double bevel cuts, so I had could achieve full bearing capacity with HRC hangers. Where  the hip rafters intersect at the ridge, at the correct roof plane location point, I installed 2 -- 6" SDS screws from the hip rafter to the ridge to keep the hip rafter from rolling/ bending away from the ridge.








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