Common cable tray includes steel cable tray, glass fiber reinforced plastic cable tray, aluminum alloy cable tray and combined cable tray. The cable tray manufacturer in Shandong Province will give instructions below.
(1) The steel cable tray, glass fiber reinforced plastic cable tray and aluminum alloy cable tray are installed, and there are three types of cable tray: slot cable tray, ladder cable tray and tray cable tray. The cable tray specifications (width+height) are distinguished. The unit of measurement is "10m", and the length of elbows, tees and crosses is not deducted. The cost of main materials for cable tray, cover plate and diaphragm shall be calculated separately.
① The stainless steel cable tray shall be calculated by multiplying the steel cable tray quota in this chapter by the factor 1.1.
② When the design thickness of the main structure of the steel bridge is greater than 3mm, the quota labor and machinery shall be multiplied by a factor of 1.2.
③ The norms of glass fiber reinforced plastic ladder type cable tray and aluminum alloy ladder type cable tray shall be considered without cover. If these two types of cable tray have cover plates, the norms of glass fiber reinforced plastic channel type cable tray and aluminum alloy channel type cable tray shall be implemented respectively.
(2) The length of each piece of composite bridge is 2m as a base piece. The base pieces need to be combined into a bridge at the construction site. The unit of measurement is "100 pieces", and the cost of main materials is calculated separately.
(3) The unit of measurement for combined bridge support is "100kg". It is applicable to the installation of columns, corbels and other supporting frames. This norm has comprehensively considered the use of bolts, welding and expansion bolts. In actual construction, no matter what kind of fixing method is used, the norm will not be adjusted.
(4) The cable tray, corbel, column, diaphragm and cover plate are purchased finished products. The connecting bolts and connectors are purchased with the cable tray in a complete set. The calculated mass can be calculated as 7% of the total weight of the cable tray.
This is the end of the common cable tray classification of the combined cable tray. If you have any questions or needs, please come to our website at any time http://www.pembertonchristian.com Understand!