Birdsmouth

Birdsmouth

A V-shaped cut at the end of a structural member; typically found where a rafter meets the top sill or plate of a stud-framed wall.
References in periodicals archive ?
the metal fencing/barrier required to be installed are 525 linear metres of 0.6 metre tall metal knee rail fencing with 75mm x 75mm metal posts and 75mm x 75mm rhs metal top rail set birdsmouth - gaps every 12 metres to be 1.25 metres wide - access barrier 1 off 4 metre wide heavy duty swing access barrier with lock open metal post approximately 0.9 metres tall.
After public consultations on the whole scheme, PS15,000 was set aside to upgrade the birdsmouth fencing with decorative railings and construct the footpath at the Flatts Lane site, opposite Hollywalk Avenue.
Proposal: Development of enclosed play area, bitmac and gravel extension to existing car park, games area, relocation of existing storage container, general landscaping improvements including birdsmouth perimeter fencing, dog waste bins, litter bins and picnic benches and new steps and ramps, appropriate street signage and one CCTV column and lighting columns at Oakey's Field, Barn Hill, Stanley, County Durham.
The guide contains illustrated drawings of floor, wall, and roof components, plus offering solutions to common errors in frame openings, joist hangers and nails, blocking, holes and notching, cantilevers, load paths, birdsmouth cuts, roof loads, rafter ties, ridge beams, and trusses.
The range of products include Timber gates, Birdsmouth Fencing, Fencing Pales
One fairly common problem I see with rafters is overcutting the birdsmouth. This can weaken the framing by encouraging rafters to split.