The maximum spacing of brackets is specified, but the spacing of brackets in actual installation is less than specified, and the spacing of brackets in flange connection and threaded connection is greater than that in groove connection.

Take the most common trench in fire fighting as an example: the bracket spacing of DN65~DN 150 is generally about 4~4.5 meters (the bracket spacing is related to the span of the beam, because the bracket is often installed next to the beam), and the bracket spacing of DN25~DN50 is generally about 3~3.5 meters.

Material selection of support: single DN 100 and single DN 150 pipes generally use 5# angle steel, 5# channel steel or 6# channel steel; When two * * * brackets are used, 8# or 10# channel steel will be selected; Three pipes * * * will use 10# or 12# channel steel; DN50~DN80 is less used in spraying, and DN65 is more used in fire hydrant, which is generally considered as 5# angle steel. DN25~DN40 are generally considered as 3# or 4# angle steel.

Calculation:

When calculating the support, the length of the suspender is really the key, so it is necessary to determine the elevation of the pipeline and the bottom of the floor (because the fire hose is generally installed at the bottom of the beam, the height of the beam is very important). Generally, the suspenders supported by basements are longer and the floors are slightly shorter.

Therefore, roughly estimate the spray pipe support: 150. 100, pipe spacing of 5# channel steel 4.5m, U-shaped support, single support material 1.5m, 80.65.50, pipe spacing of 5# angle steel 4.5m, U-shaped support and single support material 650.