| 摘要 |
PROBLEM TO BE SOLVED: To provide a screw for lightweight cellular concrete that is easily screwed into a lightweight cellular concrete layer, allows easy screwing work, increases resistance of the lightweight cellular concrete against a tensile force in the drawing direction, and can certainly hold a member. SOLUTION: This screw for the lightweight cellular concrete comprises a head part 1, a screw part 2, and a conical tip 3. A drawing side flank angleαof each screw thread 5 in the screw part 2 is 10 deg. to 20 deg., and an approach side flank angleβis 35 deg. to 45 deg.. The conical tip 3 has a diameter same as or smaller than a root diameter L2 of the screw part 2, and a cutting edge 7 is formed on one side of the tip 3.
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