METAR LADDER
METAR LADDER
Load-Deflection Tables
2.4.3 METAR Equal & Unequal Tees
Speedway Equal & Unequal Tees
(300mm Radius)
METAR Equal
& Unequal Tees
(450mm Radius & Above)
600mm
300mm
300mm Radius
2/3R
450mm Radius
& Above
600mm
300mm
2/3R
600mm
2/3R
When correctly mounted and secured, cable ladder can
be considered to be a ‘conti nuous beam’. This implies
that the cable ladder run is regularly supported and that
the cable ladders at the extremities of the run are firmly
anchored. The following tables are used to calculate the
safe working load and have been verified by testing in
accordance to BS EN 61537 .The load bearing capacity of
a cable ladder is limited by the lesser of the maximum
allowable stress induced in the side members and rungs
or the maximum deflection acceptable in the same
members. The maximum allowable stress is usually limited
by the materials lower yield stress; this gives a safety
factor of 1.7 against the ultimate tensile strength.
Maximum deflection, (in the absence of a particular
customer need) is not allowed to exceed 1/360th of the
distance between supports (span) longitudinally or 1/200th
of the rung length (cable ladder width) transversely.
300mm
For equal and unequal tees with radii of 300mm, supports should be
located within 300mm of the tee on each branch in the cable ladder run.
For equal and unequal tees with radii of 450mm and above,
supports should be located within 600mm of the tee on each
branch in the cable ladder run.
Intermediate supports should be placed at approximately 2/3 of
the radius (R) on each branch of the tee as shown.
Loading Data - Vantrunk Extreme
Steel Hot Dip
Galvnaized Finish
The data given in the tables is for METAR cable ladder
installed as a continuous beam and allows for the
weight of the ladder itself. The safe working load values
represent a uniformly distributed load and a factor of 1.7
as recommended in the cable ladder European standard.
This information is given for guidance only and larger
safety factors can be used depending on the installation.
The METAR Cable Ladder system, components and
accessories have been tested to BS EN ISO 61537.
Further details are can be provided by our Design Team.
Loading Data - 1.4404 Stainless Steel
(316 Marine Grade)
Span & Safe Working Load kg/m
Ladder Type
Width
W mm
2m
2.5m
3m
3.5m
4m
4.5m
5m
5.5m
6m
MT4/SL/150/G
150
542
346
239
175
133
-
-
-
MT4/SL/300/G
2.4.4 METAR Intersection
Although unusual, there may be occasions when it is
difficult or indeed impossible to anchor the cable ladder
securely in position. Under these circumstances the
ladder is ‘simply supported’ and its load bearing ability is
substantially reduced. As a rough guide maximum loads
should be limited to two thirds of those shown in the
loading tables and increased deflection values should be
accepted for each span.
300
542
345
238
174
132
-
-
-
Span & Safe Working Load kg/m
Ladder Type
Width
W mm
2m
2.5m
3m
3.5m
4m
4.5m
5m
5.5m
-
MT4/SL/150/SS
150
473
301
208
152
115
-
-
-
-
-
MT4/SL/300/SS
300
473
301
208
151
115
-
-
-
-
6m
MT4/SL/450/G
METAR Intersection
(450mm Radius & Above)
450
541
345
238
173
132
-
-
-
-
MT4/SL/450/SS
450
472
300
207
151
114
-
-
-
-
MT4/SL/600/G
600
470
344
237
173
131
-
-
-
-
MT4/SL/600/SS
600
445
300
207
150
114
-
-
-
-
750
369
343
236
171
130
-
-
-
-
MT4/SL/750/SS
750
282
282
206
150
113
-
-
-
-
MT4/SL/900/G
900
254
254
235
171
129
-
-
-
-
MT4/SL/900/SS
900
194
194
194
149
113
-
-
-
-
MT4/SL/1000/G
1000
184
184
184
170
128
-
-
-
-
MT4/SL/1000/SS
1000
140
140
140
140
112
-
-
-
-
150
-
-
491
359
274
215
173
-
-
MT5/SL/150/SS
150
-
-
429
314
239
188
152
-
-
MT5/SL/300/G
600mm
MT4/SL/750/G
MT5/SL/150/G
METAR Intersection (300mm Radius)
300
-
-
491
359
273
214
172
-
-
MT5/SL/300/SS
300
-
-
429
313
239
188
151
-
-
MT5/SL/450/G
300mm Radius
300mm
450mm Radius
& Above
450
-
-
490
358
273
214
172
-
-
MT5/SL/450/SS
450
-
-
428
313
238
187
150
-
-
MT5/SL/600/G
600
-
-
490
358
272
213
171
-
-
MT5/SL/600/SS
600
-
-
427
312
237
186
149
-
-
MT5/SL/750/G
750
-
-
367
356
271
212
170
-
-
MT5/SL/750/SS
750
-
-
350
312
238
186
150
-
-
MT5/SL/900/G
900
-
-
251
251
251
211
169
-
-
MT5/SL/900/SS
900
-
-
240
240
237
186
149
-
-
MT5/SL/1000/G
1000
-
-
181
181
181
181
168
-
-
MT6/SL/150/G
2/3R
150
-
-
-
-
357
280
226
185
155
MT5/SL/1000/0S 1050
-
-
174
174
174
174
149
-
-
MT6/SL/300/SS
-
-
-
-
311
244
196
161
134
300
MT6/SL/300/G
300mm
300mm
300mm
600mm
2/3R
600mm
300
-
-
-
-
356
280
225
185
154
MT6/SL/450/SS
450
-
-
-
-
310
243
196
160
134
MT6/SL/450/G
2/3R
450
-
-
-
-
355
279
224
184
153
MT6/SL/600/SS
600
-
-
-
-
309
243
195
160
133
MT6/SL/600/G
600
-
-
-
-
354
278
223
183
152
MT6/SL/750/SS
750
-
-
-
-
308
242
194
159
132
MT6/SL/750/G
2/3R
750
-
-
-
-
354
277
223
182
152
MT6/SL/900/SS
900
-
-
-
-
308
241
194
158
131
MT6/SL/900/G
600mm
For crosses with radii of 300mm, supports should be located
within 300mm of the cross on each branch in the cable ladder
run.
900
-
-
-
-
251
251
222
182
151
MT6/SL/1000/SS 1000
-
-
-
-
237
237
193
158
131
MT6/SL/1000/G
1000
-
-
-
-
181
181
181
181
150
MT6/SL3/1000/G 1000
-
-
-
-
171
171
171
157
130
For crosses with radii of 450mm and above, supports should be
located within 600mm of the cross on each branch in the cable
ladder run.
Intermediate supports should be placed at approximately 2/3 of
the radius (R) on each branch of the cross as shown.
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