Apr 03, 2013 10:25 pm
I'm currently building a house in Perth and they've just completed the roof structure. The structure has a few steel beams across which I understand is to support the roof and keep it down. At either end the beam sits on single bricks! It's not secured in any way in the longitudinal direction!
I had a building inspector perform an inspection and they said it's normal practice. I'm concerned that if there is any earthquake (rare they may be) the beams would quite easily fall off.
Does anyone have any opinion/solution/experience on this? Pictures below.
Re: Steel beams in roof structure2
Apr 03, 2013 10:37 pm
You will find they will comply with a building standard that will be based on your region and the risk of natural disasters. As a general rule the weight of the beam and the roof on top of it will be plenty sufficient for it not to move and comply with the local standards. I do know in some regions they do tie roofs down to the main house - in Townsville QLD for example all new houses have to be tied in because of the cyclone risk.
No doubt there would be a way to do this but you should really weigh off the cost of doing this against the real risk. You could get an engineer to let you know what sort of pressures the house would need to be subject to before the roof moved and then look up how often equivalent "events" occur. There may be information on the the internet under a building code somewhere although it will probably only tell you the requirement but not provide the details of how the requirement was calculated in terms of the risk.
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