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01. Cable
tray fire safety requirements section of cable ladder tray,
add a fire-resistant or flame retardant properties of the
board, net material enclosed or semi-enclosed structure and
take the bridge and its supports and hangers the surface
brushing fireproof coating and other measures, the overall
fire resistance should meet the requirements of relevant
national norms or standards.
02. A higher place in the engineering fire protection
requirements, should not be made of aluminum alloy cable
tray.
03. Trough cable tray width and height of the selection
should meet the requirements of the filling rate, the
filling rate of the cable ladder and tray in normal
circumstances, the power cable desirable 40% to 50% the
control cable desirable 50% to 70%, and should set aside 10%
to 25% of the project development margin.
04. Select the load rating of the cable tray, cable tray
uniform load uniformly distributed load should not be
greater than the load rating of the selected cable tray
rated cable tray supports and hangers actual span is not
equal to 2m, then the work should meet the requirements of
uniform load.
05. Various components and supports and hangers in the
corresponding load conditions to meet, in sizes tray, ladder
line segments, elbow series match.
06. Select trough cable tray elbow or cited, cited under the
device should not be less than the minimum permissible
bending radius of cable tray cable.
07. 6m steel cable tray and span for spans greater than
greater than 2m or load requirements greater than the load
grade D grade aluminum cable tray, the intensity should be
engineering conditions stiffness and stability calculations
or experimental verification.
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