The galvanised strap bracing is fixed at each end and tensioned with turnbuckles. However the bracing crosses over wihout the use of a compression device. A compression ring appears to be an uncommon practice from sites viewed using mild steel rod bracing.
11 March 2007
ROOF BRACING
RIDGE JOINT - ROOF BRACING
The ridge is stiffened with a galvanised mild steel gussett plate to each web of the rafters. The bracing is flat strap or bar (not rod) tensioned by turnbuckles. The bar is directly fixed to the channel and gusset flange.
KNEE JOINT
Both the column and the rafters are made from two back to back cold formed C channels bolted together. The joint is a single piece hot dipped galvanised steel C channel gussets fitted inside the cold formed C channels and bolted through the webs. The gusset plates have stiffening. A cold formed C section tie is bolted to the cleat welded to the gusset plate.
FOOTING CONNECTION
The columns or stanchion is connected to the concrete reinforced footing with a hot dipped galvanised angle bracket placed each side of the webs. Note that a UB is made from two back to back C section channels.
FRAMING SYSTEM
The internal framing system is a portal frame, however instead of a hot rolled section the frame uses a cold formed UB section strengthened with hot dipped galvanised gusset plates bolted to each face of the cold formed UB's web section at each the main bending moment junctions. The system has been produced by local company GALFRAME .
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