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Pryda floor trusses must be braced back to their supporting structure for stability in a similar manner to the bracing stipulated by AS1684.2-1999 for solid deep joists. Use diagonally placed Pryda Strapbrace or timber braces (minimum thickness of 25 mm) at 1800 mm centres maximum at the ends of trusses and at any internal wall supports. Alternatively, a continuous trimming beam may be used at the end of each truss – see End Type 3 – with diagonal bracing at the end bays only.

Pryda floor trusses must be braced back to their supporting structure for stability in a similar manner to the bracing stipulated by AS1684.2-1999 for solid deep joists. Use diagonally placed Pryda Strapbrace or timber braces (minimum thickness of 25 mm) at 1800 mm centres maximum at the ends of trusses and at any internal wall supports. Alternatively, a continuous trimming beam may be used at the end of each truss – see End Type 3 – with diagonal bracing at the end bays only.

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Pryda floor trusses must be braced back to their supporting structure for stability in a similar manner to the bracing stipulated by AS1684.2-1999 for solid deep joists. Use diagonally placed Pryda Strapbrace or timber braces (minimum thickness of 25 mm) at 1800 mm centres maximum at the ends of trusses and at any internal wall supports. Alternatively, a continuous trimming beam may be used at the end of each truss – see End Type 3 – with diagonal bracing at the end bays only.

Each truss shall be held onto its supporting plate/bearer by a minimum of 2/75×3.15mm dia. Nails. If preferred, a better fixing may be achieved by using one Pryda Minigrip with 3/35 x 3.15 mm dia. Pryda nails per tab.

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Each truss shall be held onto its supporting plate/bearer by a minimum of 2/75×3.15mm dia. Nails. If preferred, a better fixing may be achieved by using one Pryda Minigrip with 3/35 x 3.15 mm dia. Pryda nails per tab.

When supporting trusses on steel or timber beams via top chords it is important to restrain the bottom chord using skew nails while the top chord should be fixed to the supporting beam using screws or Pryda Triplegrips. This practice improves the stiffness of the floor by minimising movement and vibration at the supports.

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When supporting trusses on steel or timber beams via top chords it is important to restrain the bottom chord using skew nails while the top chord should be fixed to the supporting beam using screws or Pryda Triplegrips. This practice improves the stiffness of the floor by minimising movement and vibration at the supports.

If the wall is positioned between two floor trusses and is a wind bracing element with a capacity of no more than 1.5kN/m and does not exceed 2.7m high, fix noggings at each end of the bracing element to transfer wind forces to the adjacent trusses. Use 2/14gx100mm Timberfixx drilling screws to fix the bottom plate of the bracing element into the nogging, and 12gx65mm Timberfixx screws to fix the bottom plate to the flooring at 450mm centres along the length of the bracing element. For wind bracing wall capacities of up to 3.0kN/m fix a 120×45 MGP10 strongback to the vertical web nearest the end of the bracing element. The strongback will pass through two trusses either side of the wall and fix to the webs with 2/12gx65mm Timberfixx screws. The flooring material shall be nailed and glued to all floor trusses in the flooring system.If a bracing wall sits directly over a floor truss then fix 14gx100mm Timberfixx screws into the truss at 450mm centres along the length of the bracing element along with 2/14g x 100mm screws at each end for 1.5kN/m wind bracing capacities. Use 4 screws at each end with the strongback detail as outlined above for up to 3.0kN/m wind bracing capacities.

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For wind bracing walls of up to 1.5kN/m wind bracing capacity with the element no higher than 2.7m, use 14gx100mm Timberfixx screws to fix the bottom plate of the bracing element to each perpendicular floor truss. If the end of the bracing element finishes directly above a floor truss use 2/14gx100mm Timberfixx screws, and if not then use the same screws into the nogging as previously mentioned. For wind bracing walls of up to 3.0kN/m capacity adopt the same details as for bracing walls parallel to the floor trusses. The flooring material shall be nailed and glued to all floor trusses in the flooring system.

Pryda roof trusses must be fixed down to the supporting structure using connections that match or exceed the magnitude of the wind uplift forces on each truss. Each truss shall be held onto its supporting plate/bearer by a minimum of 2/75×3.15mm skew nails, or one Pryda Minigrip or Multigrip with 3/35×3.15mm nails per tab. Refer to AS1684-1999 for further guidance on fixings and tie down requirements.Pryda roof trusses shall also be braced laterally at the ends of the trusses using Pryda Strap Braces at each end of a run of trusses.