minimum width for a roof staple crown as a fastener
b. Staples shall have a minimum crown width of 7/ 16-inch on diameter except as noted. c. Nails or staples shall be spaced at not more than 6 inches on center at all supports where spans are 48 inches or greater. Nails or staples shall be spaced at not more than 12 inches on center at intermediate supports for floors. d.