Table 2.--Allowable strengths of lumber and truss plate
For good measure, I further secured them, where the ends of two stringer boards met at a post, with galvanized metal truss plates
nailed across the joint.
Additionally, a tension truss plate
test was performed on full cross section lumber with the truss plate
embedded into blue-stained wood.
2 southern yellow pine lumber and 20-gage (3 by 4 in.) metal truss plates
under six different loading conditions.
According to Quaile and Keenan (1979), truss plate
backout can be caused by shrinkage across the grain of the lumber.
Stuart Lewis, Alpine Engineered Products, Inc., donated Wave Plate[TM] truss plate
connectors and southern pine lumber.
Institute is in the process of soliciting comments on Draft 2 of proposed BSR/TP 1-2000 National Design Standard for Metal Plate Connected Wood Truss Construction (Revision of ANSI/TPI 1-1995).
Simpson through its subsidiary Simpson Strong-Tie Company Inc, designs, engineers and manufactures wood construction products such as connectors, truss plates
, fastening systems, fasteners and shear walls, besides concrete construction products like adhesives, speciality chemicals, mechanical anchors, powder actuated tools and reinforcing fibre materials.
For roof supports, two pieces of 2-inch-by-4-inch treated lumber connected with 4-inch truss plates
were built to have a 12-inch center height, also with angled cuts all the way to the ends.
One possible solution for limiting checking and splitting on crossarms is to apply metal truss plates
to the ends of the arms to restrain wood movement, thereby limit checking.
Fasten doubled-end rafters to front/back plates with 8d nails through narrowest part of front and rear notches; fasten with metal truss plates