Questions regarding the height of T-type supports in HG/T21629 pipe racks
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In HG/T21629-1996 \"Standard Drawings for Pipe Racks\" (Volume 4), why is there no information regarding the relationship between the height and load of the T-type supports G1 and G2? In other words, how tall can a G1 type T-truss be? What is the load being borne at this time? I’m currently working on a pipeline layout and need T-type supports. There is one pipe with a DN80 diameter to be installed on the support (the medium transported is water); the pipe is made of carbon steel. It needs to cross a road, and the elevation of the pipe’s bottom is 5 meters. Therefore, I’m not sure whether to choose G1 or G2 It’s so high; can G1 or G2 be used? Should we choose another type of pipe rack? Please give me some guidance. Thank you!
The instructions in G1 and G2 of HG/T 21629-1999 state that the loads should be referred to in Appendices AA-32 and AA-33. It can be seen from the graphs of AA-32 and AA-33 that the maximum height of the pipe rack is 3.5 meters. For 5 meters, the design needs to be reviewed; G1 and G2 cannot be used directly.