Monday answers
The first question refers to wood shakes and shingles. The standard thicknesses of shingles are described as 4/2 (four shingles to 2� of butt thickness), 5/2, 1/4, (five shingles to 2 � inches of butt thickness), and 5/2 (five shingles to 2 inches of butt thickness). Note please. I had a reading error and the book had an editing error in the 5/2, 1/4, listing. The book reads ��5/2, 1/4,�� as if the shingles were packed as two different types of thicknesses and I read it that way. However, later in the chapter under the thickness of wood shingles and shakes, the book states �The standard thickness of shakes ranges from 3/8 inch to 1 � inches.� If that is true then there is no commercial size of wood shingle that is 1/4--four shingles for one inch of butt thickness. I called and then confirmed that the latest edition of the Wood Handbook used a fractional notation for the �. Chapter 5, Commercial Lumber, Page18, Shingles and Shakes
As to the staple bonus question. I was (and am) perfectly willing to settle for a ballpark 2/3. The formula is p=KD3/2 with the 3/2 notated as a power above the D (as if it were a square or cube). p is the lateral load in pounds per inch. K is a coefficient; and D is the diameter of the staple in inches. Values of the coefficient have a number of conditions like moisture, ovendry weight, and slippage at 0.015 inches, and are expressed in a table for ranges of specific gravity of three each hardwoods and softwoods. Let me just say that Steve�s answer of 71% makes much more sense than the chart of my government so he gets a big gold stickum star for his forehead. It is difficult for me to duplicate the formula and chart, but the reference is Chapter 7, Fastenings, page 6 and page 8.
Sorry for the confusion.
