Scale reading help (architecture) please help?

Question

can someone please help me with this, I don't know how this is the answer??

"3/4" is equal to 1'-0". On a 3/4 scale, 6" converts to 8' (actual size)."

AND

"the studs are 16" on the center, 1" on a 3/4 scale."

Answer 1

You have it wrong, ignore the 6" converts to 8' actual size.
(3 X 6)/4 = 18/4 = 9/2 = 4.5' = 4'-6" and that is not 16” O.C.

If studs are at 16" on center (O.C.); typical rating for residential housing, then that means they are at a spacing of 1'-4". On a 3/4 inch scale that would be 1'-0" and then when you look at the smaller sub scale you would count off an additional 4".

The scales on an architectural scale are denoted in two fashions. First the 1/16th scale goes from 1 to 12 and is in actual, real world scale, all of the other scales are in a reduced scale mode and are marked in units of 1 foot for each foot in that scale. Since the scale works backwards for the smaller scales the 3/4" scale would be marked off in 1'-0" increments with only the large lines, the reverse 3/8" scale would be half and so it would use the large and small lines.

IN each case the subscale has tiny increments marked off on one end; those are the inch marks. So you would start at 0 on the 3/4" scale and count over 1 scale foot to the right and 4 scale inches to the left. That TOTAL measurement would be 16" or 1'-4".

At 8'-0" in the real world a 3/4" scale would be:
3/4 X 8'-0" = 24'-0"/4 = 6'-0" NOT 6" if you laid the 8'-0" on the 3/4" scale then it would measure out to be 6" in the real world, but you aren't in the real world; you are in the 3/4" world so forget the 6" to 8'-0" because you are going to use an architecture scale and not a standard ruler. The purpose of the triangular scale is to prevent you having to make those laborious conversions and so get confused.

Answer 2

If the scale is 3/4" = 1'-0" that means that all linear dimensions on the drawing are 16 times smaller than the actual size. Essentially, 3/4":1' is the same as 0.75":12" or equivalently 1:16 scale.

By using this scale system, 6" on the drawing converts to 16*6"=96" which is the same as 8'. Also, 16" in actual size converts to 16"/16=1".

But 3/4"=1'-0" is a fairly small scale, depending on the size of the paper and building. Most drawings and plans that I work with are on the order of 1/8"=1'-0".