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hey i just purchased a special priced frame kit for rhe tornado and have a guestion about lumber size. for instance the plans call for the engine stringers to be 1-1/4" +6"+13'. is that actual dementions of the stringers,if so then you would have to start with a 2+8+13 and cut and plane it the dimentions called for, is that what you have to do? also the stringer blocks call for a 2"+2"+7',inthat case would you start with a 3"+3"+7' piece of wood? im confused, any help to straighten me out would be apriciated. gotya


























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gotya

the dimensions for the framing is nominal. So in practice you can have pieces that are slightly larger or smaller then the listed dimension and it will still be correct. So I would think for the 6" wide motor stringer you would be fine using something that is a little less in width or a little wider which ever one is easier to locate.

Just my 2 cents.

Usually, unless the plan calls for a "net" size, then it nominal.

So a 2" x 6" nominal will normally only be about 1 1/2" x 5 1/2" after it has been planed and jointed - "dressed on 4 sides" (D4S)

HOWEVER, when talking about a 1" x whatever, the thickness can be a little less, but the width should be exactly what is called for in the plans - so a 1" x 8" could be 3/4" by 8" which would be ok, but 3/4" x 7 1/2" would probably not be ok.

The designer will normally have taken that into account when specifying the dimensions for lumber. They know the thickness will be somewhat less, but the width should be exact.

However, if they do specify 1" NET thickness, then yes, you have to start with 5/4 (1 1/4") lumber and dress it down to 1" which would be required to get the necessary strength for that piece.

Often if you go to a real lumber yard as opposed to one of the big box retailers and you ask for some 1 x 8, they will say "do you want nominal or do you need at least 8" wide".

Read any notes that go along with your plans (fastening schedule etc). The designer should have notes on what is and isn't acceptable with regards to the dimension of the lumber...

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Graham

Yes, Plywood is "real" wood

A "professional" is someone who gets paid for their work - it doesn't necessarily mean they are good at it