| 摘要 |
A triangular crib is made from chocks 17, each chock 17 comprises a length of timber typically about 750mm to 1000mm long, 75mm to 100mm thick and 100mm to 200mm deep and typically 150mm deep. Each chock has a first end 19 and a second end 20. Three chocks 17 form a layer 21 with mitred half lap joints at ends of the chocks. The chocks are held in place by a joiner 22. The lap joint cheek is reversed at each end of each chock, and each cheek has a through hole 23 and the joiner is a dowel type joiner 22 inserted into the hole 23 as shown. 2,3 1A 2 -1 |
