Abstract
Experiments on the yield strength of joints at a ridge, fixed piles and pipe connectors of pipe-houses were conducted. The insertion length of a swage type joint at a ridge should be more than three times of the pipe diameter. The strength of the joint with much insertion is almost the same as that of a pipe without a joint. The allowable strengths for pull up of a screw pile and an anchor pile in general cultivated land are 150kg and 200kg, respectively. The yield strength of pipe connectors made of metal wire is less than that made of metal sheet, but both types satisfy the required strength.
