Irene Kightley wrote:
mountainDon Miller wrote:
Just a note on carriage bolts.
Carriage bolts are usually threaded all the way from the end to the head. This reduces the effective diameter of the carriage bolt and effectively reduces its strength. Building codes generally do not recognize carriage bolts.
A standard hex head bolt, on the other hand, is only threaded near the end, more or less enough space for a washer and nut and enough protruding thread for safety. When used on wood a flat washer should be placed under the head.