Wednesday

Main Living Engineering Questions



Main Living looking west.
Brad here with a few thoughts for Michael of Reed and Associates, Engineers.  According to Langley's inspector,  a roof must have a ridge beam.  As you can see, this one does not.  Does this create a shear problem at the top of the ridge where the rafters want to twist and if so, would blocking fix it?  Our inspector would also like to see gusset plates or strapping between the rafters at the top.  Keep in mind the distance of beam to ridge along the line of the rafters is about 6.5 feet, 5 feet true to the earth.  With 2x8 rafters at 16" o/c, it feels rock solid but needs the blessing of an engineer.

Also, as you can see, I don't have bird blocks at the overhangs on the east end or  anywhere along the beams on the outdoor porch. The issue here is that there is no shear transfer to the beam out at the ends, and no shear walls in these areas either.  It seems to me that the loads can transfer along the plane of the roof to the blocks over the walls.  My reason for no bird blocks   is aesthetic.  The overhangs and porch are more pleasing without blocks, allowing more light to come through.

Builders note:  the approximate 20x40 foot roof felt super solid with three guys up on top throwing materials around even before all the plywood was nailed off.  With the plywood there is no movement. 



Main living from the east side, looking west.
















Main living rafters and ridge looking east.




















Main living looking west out onto porch.
















Main living looking north.  Intersection of indoor and outdoor space.

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