Foundation anchors can be placed into a wide range of soil profiles including swamps, sands, soft rocks or vegetated hillsides. The anchors are equally effective resisting cyclonic uplift forces, horizontal flood forces or vertical loading. The anchors require no concrete or special tools to install and due to the galvanizing are guaranteed for in excess of 30 years. At the end of this time they can easily be replaced
Galvanized sheet metal, tophat frame
The sheet metal tophats which form the bearers, joists, wall frames, mezzanine joists and roof purlins are fully galvanized and resistant to corrosion. By introducing a minor current to the frame all galvanic corrosion would be totally eliminated! The flexibility and resilience of steel makes the unit resistant to cyclones, typhoons and earthquakes, as well as termites borers and/or rot.
The bearers are located over and screwed or bolted to the foundation boots. The floor joist tophats are then screwed to the flanges of the bearers. Care should be taken to ensure the squareness of the base. It should also be noted that a clip of the tophats stops the inherent spread whilst the fastening sinews are located. The perimeter folded bottom plate that the wall studs ate screwed to is then fastened to floor joists.
An advantageous feature of the metal frame is that local wall and floor material - eg. Bamboo, woven palm or grass can be easily fixed to the metal studs. In this application slit bamboo could be fixed to the floor.
Once the ground floor working platform is installed the wall studs are progressively screw fixed to the perimeter bottom plate. Using locally available material the studs are temporarily stabilized by tying back onto the working platform.
The wall studs may also need to be permanently or temporarily braced with diagonal metal battens.
The next stage is to construct the next level which serves as the mezzanine sleeping quarters and also acts as the upper level working platform.
The horizontal bearers (made from 1.2mm folded sheet metal) are screw fixed to the metal top hat wall studs. The mezzanine joists are locked and screwed into the bearers after which the flooring material is fixed to the joists.
Stair or permanent ladder access and a hand rail could now be fixed to the mezzanine while other crew members proceed to fix a continuous channel to the top of each stud. This increases the stability of the frame enormously. The top plate needs to be clipped with tinsnips to allow it to follow the segmented curve of the wall studs.
The corrugated sheeting, depending on its thickness, width etc may need to be prerolled to the correct radius.
Roof, Wall, Doors, Louvers, Lattice windows
The tophat purlins are now screw fixed to the top plate. A roof covering consisting of local materials, UV resistant PVC coated nylon, or Astro foil insulation (R2.5) and corrugated sheeting can now be fixed.
Whilst part of the crew is installing the roof, the remainder are commencing the lining of the walls, |installing doors, louvers, flyscreens and lattice windows.
The concept lends itself to the minimization of glass and any material which could cause injury due to breakage under adverse weather conditions.