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Thread: Stair and roof calculator
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12th November 2006, 01:39 PM #16
Creepers run from walls to the sides of hips or from ridge to the sides of valleys. Out on site the latter are usually termed 'valley creepers' so as to distinguish them from hip creepers and in so doing minimise the risk of cutting the plumb cut the wrong way
Cripples run between valleys and hips.
The rest are common rafters.
The jack rafters are the same as common rafters but get given the name 'jack' because of their position in the roof.
Sleepers here are found under railway tracks or may be used as retaining walls around gardens.
Now if Blocklayer would be so kind as to tell this chippy what he means by " Birdsmouth seat width" I'll be a happy camper.
Cheers,
Mark.I wanted to become a brickie but my old man said "No son, learn a trade."
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12th November 2006 01:39 PM # ADSGoogle Adsense Advertisement
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12th November 2006, 02:55 PM #17
I would hazarard a guess that would be the width of the birdsmouth sitting on the top plate of the wall. If you don't know what the birdsmouth is that is the notch in the rafter that sits on the top of the top plate.
This only applies to a full cut roof because trusses don't have a birdsmouth as such.
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12th November 2006, 02:58 PM #18
If that's the case then that's what we carpenters call the foot cut. The vertical cut being the plumb cut. The length or more correctly the depth of the birds mouth is what we're interested in, the length of the foot cut is a function of the pitch and the sectional size of the timber and as such there is no need to calculate it. It is, whatever it finishes up being.
I wanted to become a brickie but my old man said "No son, learn a trade."
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12th November 2006, 03:42 PM #19
duckman
You must remember he is a blocklayer but considering that he had done some excellent work with his programs.
The problem is in the building trade terms of things can change from city to country, state to state as well as from country to country.
e.g. NSW, Astrigals, some other states they are down pipe straps Nozzles are called pops etc.
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12th November 2006, 03:47 PM #20I wanted to become a brickie but my old man said "No son, learn a trade."
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12th November 2006, 04:04 PM #21
I'm sorry duckman if I touched a raw nerve. I never meant to be condecending if you wanted to take it that way. Like I said trade terms vary and it doesn't make any one right or wrong it is just the way others have learnt them and it was just my way of answering a question you asked and I'm sorry if it upset you so much. But I'm afraid sometimes that's life
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12th November 2006, 04:07 PM #22
Don't worry Barry, ducks always get snappy if you stir 'em up!
Blocklayer, I took the aptitude test and only got 18 right, how do I improve so I can become a qualified blockie?
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19th October 2007, 08:20 PM #23Novice
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- Brisbane
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Just wanted to thank you for this simple and easy to use program
THANKS
GMC
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17th March 2008, 06:48 PM #24New Member
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Great Program. I've used it a lot.
Very occasionally, in the roof calculator, it seems to make common rafters about 10mm too short. I haven't narrowed down exactly where, though.
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4th July 2010, 08:07 AM #25New Member
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- Jul 2010
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- uk
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staircase pitch calculator
ok! not sure if this is any use but will calculate pitch for stairs to finish at floor level rather than butting into the trimmer. it is designed for wood stairs. any comments please forward. Pitch Calculators.