“长办”三角测量第四队在唐白河扩测区就开始推广三脚觇标的建造(其类型由三脚锥形标直到复杂高标)。目前在江西测区全部觇标亦是继续采用三脚标,经过检查与鉴定,证明质量牢固、稳定,可供中等风力时观测。现将三脚觇标(着重复杂高标)情况的建造情况介绍如下: 1.普通高标及复杂高标约可节省材料1/4-1/5、建造人天也可减少1/5(挖坑及打椿除外),使木材及运输与制作方面均节省20-25％。 2.在结构方面与四脚标是相同的(如基本橹柱 The “Long Office” triangulation team No. 4 started to promote the construction of the three-legged signage in the Tangbaihe expansion area (its type is from three-legged conical sign to complicated high-grade signage). At present, all test targets in Jiangxi are continuously using the three-legged standard. After inspection and appraisal, it is proved that the quality is firm and stable and can be observed during moderate winds. The construction situation of the three-legged signage (focusing on complex high standards) is as follows: 1. Ordinary high-standard and complex high-bidding materials can save 1 / 4-1 / 5 of materials and 1 / 5- Pits and pens), saving 20-25% on wood and in transportation and production. 2. In terms of structure and four feet is the same (such as the basic pillars