Steel truss are combined underground and then use lifting equipment to erect. Minimizing the right combination of location aloft by selecting cranes, lifting equipment suitable or optimal construction methods (see attached drawing
- Acceptance of screw bolts force for all the bolts are combined at the position on the ground (marked with paint if necessary).
- Use the anchor cable D10, D12 fixed symmetrical cable lock on both sides on the truss in the ground (the truss will be installed in a corner wood roof), required to complete temporary anchorages cable points, the distance between the anchor cable for truss is <= 6m.
- use rope marquetry 02 at either end components required to adjust the truss crane put into Subject location to avoid collisions when rotating crane.
- selecting the focus to balance the crane components, lifted structures off the ground about
50cm, keep the structure stable equilibrium before lifting crane truss into position .
- vertical lifelines must be mounted in the ground lease before truss crane and put into place
- insert the truss on top of the column location, use the mouse to guide truss into place, located in the plane truss frame contains columns perpendicular to the ground.
- Hold the crane, installation and tighten bolts linking the entire column with an adequate bond. During that stretch
temporary bracing anchor cable Turnbuckle with two symmetrical methods. Inclination of anchor cable to the plane created from 30o to 45o background is reasonable. The angle created by the two cable cranes 60 o.
- Proceed up the second truss erection on similar second column, noting that the anchor cable tension must
be increased by increasing tension enough to keep rafter trimmer is stable.
- after erection truss finished second crane remains, conducting peak deployment and purlins purlins eave edge. Continue installation 100% purlins on all remaining positions.
- Installation of cable bracing of walls and roof stiffener, moderate tightening tension. Will increase after hard
- Take steps similar to the installation of the next frame. However when mounting hardware to the next compartment, the entire purlins and diagonal bracing of the chamber must be fitted before installation to complete.
- For cavity cavity is not hard, the purlins in the chamber is installed with the minimum number is one quarter of the number of purlins chamber, but not less than 03 trees inside roof purlins for a crane before liberation.
- Once installed purlins, carried out simultaneously install bracing purlins and anti-roll purlins for all purlins were installed.
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