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Published bySolomon Norman Modified over 9 years ago
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Created by Michael Martin 13/9/04 – Reviewed June 2010
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You can either Mark your creepers on pattern rafter, or Calculate their true length
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Some people refer to this as a gambrel end Can be finished with ◦ Fibre-cement sheets, or ◦ Timber cladding, or ◦ Other desired finish Must be correctly flashed
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Insert flashing behind cladding, minimum of 50mm turn up
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Small roofs can be framed on top of hip like shown (handout) Larger spans are approached differently, which we’ll look at now (handout)
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Size of gablet is determined by the number of rafter spacings past the centering rafters Set out of centering rafters remains the same as for the hipped roof
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Length of ridge for hip initially the same (handout), then rafter spacings added If at one end only, add three rafter spacings If at both ends, then add six rafter spacings
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Pitching plate New jack rafters, are cut over the top
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The easiest way to position the pitching plate and determine length of jack rafter, is to set it out on a pattern Looking at a centre line plan view, of this roof, is the easiest way to determine this Shown on the next slide
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This example has a two rafter overhang and is also the one you will make Set-out gathering point The jack rafter can be set out on the pattern, just as you do the creepers 1 st count additional rafters (two) so you can step two spacings down from centre line on pattern Then allow for ½ thickness of rafter after that This point is the length of your jack rafter Cut this and use as a set- out for pitching plate One rafter spacing Two rafter spacing ½ rafter
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Use cut jack rafter to mark position for pitching plate Pitching plate is located at this position
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Cut in all jack rafters and notch over pitching plate
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Cut in small hips and short creepers Hips Creepers
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To complete fill in gable with trimming studs
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HANDOUT To build a scaled down version of Dutch gable roof It will be an assessment event, must complete & pass
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