| 摘要 |
<p>IMPROVEMENTS IN AND RELATING TO WEIGHT TESTING METHODS AND APPARATUS A method of testing the strength of a structure such as a crane comprising the steps of: providing a bag comprising a flexible envelope of predetermined size made from a liquid impervious material and having a closable liquid outlet adjacent one end of the envelope and a liquid inlet adjacent the opposite end of the envelope, suspending the bag from the structure to be tested, and filling the bag with liquid through the liquid inlet to a predetermined level thereby applying a predetermined weight to the structure.</p> |
