Though a beveled plate requires special fabrication, it
has some advantages over cutting a birdsmouth.Headers at openings may require double joists, depending
on the loads. Use filler blocks between the I-joists and a
backer block to support the hanger.
I-joists require blocking at end
supports to prevent joist rollover. Short pieces of
I-joist work well and provide good shear blocking for
diaphragm designs (top). Where a ventilation channel is
needed,use metal cross-bracing (second from top),
dimension lumber (third from top), or notched
engineered rim joist material (bottom).