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In a post tensioned Beam what is the minimum size bar used to support the beam? : #4 Bar What is the minimum height between finished floor and joist in the kitchen is 48" on center? : 7 FT How thick does a load bearing masonry need to be on a single story building? : 6 inches What chemical is used for high heat concrete : retarder when mechanical equipment is on the roof, how far from the edge of the roof should a warning line be if the equipment is running parallel to the roof edge : 6 feet what is the vertical distance between screws on gypsum board on an interior wall framed 24 inches on center 2 | P a g e : 12 inches what is the required thickness of a head and bed joints in a glass masonry? : 1/4 inch thickness when wide square edge boards are being for board and batten siding, how should the batten strips be nailed : to only one siding boards what is the maximum slope on the ground before a stepped foundation is required? : 10% What is the minimum between block and rebar when grouting with course grout on a hollow masonry unit? : 1/4 in When windows are installed with a stool, what is the purpose of cutting notches in the horns? : To exted the stool beyond the casings edges Fasteners for asphalt shingles shall have a minimum shank diameter of ___________. : 12 gag