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  1. woodenhead

    example calculation for reduced depth timber needed

    Hi. I have a contractor who wishes to reduce the depth of the rafters over a stairwell as he hasn't left sufficient headroom. The stairwell is 900mm wide and there are 2 rafters equally spaced which are 46 x 220 TR26. The span on plan is 4018mm and he wishes to reduce the depth to 150mm, 1168mm...

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