EWPAA Structural Plywood and LVL Design Manual - Engineered ...

Portal Joint TP3The increase in racking resistance for TP3 can only be attributed to the inclusion of the two bolts used toconnect the beam section to the portal legs.PlywoodFramingNailingTie down BoltsPORTAL JOINT – TP3– 7mm DD F8 (minimum)– 90 x 45 MGP10, JD5 (minimum)Framing procedures to follow those given in Figure 5 of the ResearchProposal in Appendix A1– 2.8 ø x 35 long galvanised clouts– 3.15 ø x 75 bullet head nails (1 off into end grain of stiffeners and studs)– 50 / 50 nailing pattern– M12 with nuts and 50 x 50 x3 washersBRACING CAPACITY : 5 kN/mPortal Joint TP4TP4 is easily the best candidate if choosing a joint on the basis of racking resistance alone. This couldwell be the case if constructing a stand alone garage, shed or similar type structure.PlywoodFramingNailingTie down BoltsPORTAL JOINT – TP4– 7mm DD F8 (minimum)– Framing procedures to follow those given in Figure 6 of the ResearchProposal in Appendix A1– 2.8 ø x 35 long galvanised clouts– 3.15 ø x 75 bullet head nails (1 off into end grain of stiffeners and studs)– 50 / 50 nailing pattern– By means of the rodsBRACING CAPACITY :7.5 kN/mClosureThe plywood only type joints may provide sufficient racking resistance for a garage having a structuralceiling, interconnected to the house, thus providing a structural diaphragm.For the stand alone situation the rodded construction provides the only viable solution. It would besuitable for spans, certainly to 6m, but not exceeding 8m. Cases would have to be viewed individually toascertain whether there were walls or open under situations. Also, in the stand alone case this does notsolve the bracing requirements in the direction perpendicular to the portal span.82