| 摘要 |
A post frame building utilizes wood posts or columns composed of upper and lower sections that are initially detached. The lower sections are set into the ground in the usual manner, and as a consequence, the top of each lower section is at a slightly different elevation. Each lower section bears a reference mark, which for all sections is located the same distance below the upper ends of those sections, and in addition after it is set into the ground, is provided with another reference mark. As to all lower sections these other reference marks are at the same elevation. The upper sections are precisely the same length, and each has a pocket opening out of its upper end. The upper sections are installed on their respective lower sections to complete the columns, but only after leveling blocks are placed in the pockets of the upper sections. The leveling blocks are all initially the same length, that length being less than the depth of the pockets. Before being installed in their respective pockets, the leveling blocks are cut off to compensate for the variations in elevation among the lower column sections, and the amount that is cut from each block is determined by measuring the distance between the two reference marks on the lower section above which the block will be positioned. When the upper sections are installed on their respective lower sections with the leveling blocks in place, the upper surfaces of the leveling blocks for all the sections are at the same elevation. The ends of roof trusses are then lowered into the pockets at the upper ends of the columns and allowed to rest on the leveling blocks.
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