Wood Screw Or 16p Nails?

E'er snapped every third deck screw in 1/2 with a screw gun? This shows how brittle common wood screws are - very depression shear strength, so they are non efficient for resisting cyclic (repeated back and forth) loading, as is required for wind and earthquake loads. On the other manus, nails are very ductile and have a flat head which also resists pulling through the connected member (the tapered head of a wood spiral will pull through when the connected member, or plywood, buckles or twists under load). Past the way, nails are considered "dowel" type fasteners in wood construction - they work past begetting against the sides of the holes made through the thickness of the two wood members ... same as lag bolts and machine bolts - so bolts are very good for resisting shear, as that is their main use. They really do not "clench" for friction in wood structure, since wood shrinks... thus you will lose any clench effect (even in steel construction, special high strength bolts are required if "clamping" forcefulness is intended). And, while adhesive is excellent for increasing force and minimizing squeaks, information technology is rarely factored into the force of structural wood connections, since it is difficult to monitor the proper installation of agglutinative in a construction environment (notice that flooring sheathing is typically glued to joists, while "shear panel" plywood is rarely glued to the studs since you're non walking on it). Lastly, high-strength structural wood screws, with a apartment head (e.g., GRK), are now available only they are extremely expensive and, as others have mentioned, fourth dimension consuming to install compared to nails.

answered Oct 17, 2018 at iv:29