The slab of this warehouse is poured around the universal column. A movement joint is made with 'abelflex' a type of foam material which separates the column from the slab concrete. This allows for movement so that cracking in the slab doesn't occur.
The construction joint shown to the right of the column is made by pouring the slab in sections.
After each section is poured, movement joint material (e.g. fibreboard, cork, mastic, plastic or rubber) is placed in position. The next section of the slab is then poured .
The purlin is connected to the rafter with the use of a cleat which can either be welded on to the rafter during fabrication or bolted to it on site. The purlin is bolted to the cleat. Safety mesh and sarking is located between the steel roof sheeting and purlins.
20mm diameter rods are used to brace the roofing structure to help keep the structure stable when lateral forces are applied.
Steel sheeting is fixed to girts with use of self tapping screws which are drilled through straight the sheet and then the girts. The screws usually have a rubber washer which helps reduce water from entering where the hole has been made.
20mm diaganol bracing is used on the walls to reduce the effect of lateral forces. These rods are fixed on the haunching at the highest point and the column at the lowest point. Both sides have adjustements so the rods can be tensioned appropriately.
Fly bracing is bolted to the rafter/beam which reduces movement in the purlins. It gives more stability to the purlins and prevents them from over turning.
Typical column, beam, haunching arrangement (knee joint). Gurts are fixed to the column with brackets and in turn the steel sheeting which is used as cladding is fixed to the girts.
Typical apex. Beams are bolted together. No haunching is used. Purlins are located close to both sides of the apex. These are connected to the beam with the use of cleats which are welded to the beam. The purlins are bolted to the cleat.
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