METAR LADDER
Closed Covers
METAR LADDER
Peaked Covers
METAR
TECHNICAL DATA
Straight Ladder
Closed Cover
This compilation of technical information is intended to
supply essential details relating to the METAR Cable
Ladder System. This will ensure that the specified cable
ladder installation has suitable strength & rigidity to
provide reliable support at minimum installed cost.
Closed covers fit directly onto the side walls of the
METAR Ladder & fittings to provide mechanical
protection and shielding for cables and other equipment
within the cable space.
Closed covers of widths of 450mm and above are
supplied with Bracing Kits (CBK) (see Bracing Kit Section).
Closed Covers are punched with centreline slots to
provide for water drainage.
Peaked Covers are
closed covers which are
formed into a peak with an
overall height of 50mm to shed
sand, snow, water etc.
Our Design Team is available to answer any questions relating to particula r site requirements which may
not be answered in the following sections.
Louvered Covers
Contents
Louvered Covers are similar to closed covers but with the
addition of louvres for improved air flow through the cable
space. Louvered covers are particularly useful where heavy duty
power cables are being used. Most traditional cable management
systems offer a raised cover for ventilation.
1.0 Metar Cable Ladder
General Information
Conventional raised covers have a number of considerations to
be taken into account before installing them. First of which is
that the cover will be susceptible to being lifted off in excessive
winds, also the extra brackets and fixings will add to the
installation time of each cover. Raised covers loading performance
is far less than the loading performance of a close fitting louvered
cover and due to the cover only being supported locally at the
fixing point the raised cover is susceptible to sagging which will
allow water and debris to build up. Louvered Covers of widths of
450mm and above are supplied with Bracing Kits (CBK)
(see Bracing Kit Section).
1.1 Slot Patterns
1.2 Standard Material Gauges
1.3 Free Base Area
1.4 Cross-Sectional Area
1.5 Speedway Cable Ladder Specification
Straight Ladder Louvre Cover
Fitting to Fitting Cover
When joining two abutting cable ladder fittings with a Fitting to Fitting Coupler (FFC) a 200mm
gap is created in the cover span. To ensure complete mechanical and environmental protection
of the cables, a Fitting to Fitting Cover is required. Fitting to Fitting Covers will be fixed directly
to the adjoining covers and will ensure complete protection of cables within the span.
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3.0 Loading Information
3.1 Dead Loads
3.2 Point Loads
3.3 Load Deflection Tables
2 0 Installation
2.1 Loads
2.2 Support Spacing
2.3 Locations of Couplers
2.4 Support Locations for Speedway Fittings
2.4.1 Speedway Flat Elbows
2.4.2 Speedway Inside & Outside Risers
2.4.3 Speedway Equal & Unequal Tees
2.4.4 Speedway Crosses
2.4.5 Speedway Reducers
2.5 Loading of Supports
2.6 Electrical Continuity Characteristics
2.7 Electromagnetic Compatibility (EMC)
2.8 Assembly Recommendations
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