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Importance is to get the roof in level and the roof is installed in a concrete beam and not like outside in light steel walls so need to check so the concrete beam are in level.We use the LPY brackets and install this in the concrete beam with the expanded bolt (2 bolt in each bracket) and then the lindab screw to the roof truss. If the concrete beam is not in level we need to adjust with some metal plate. I will buy this for them. The first day we go there together and we check the beam and start to assemble the light steel.
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