Swiftrack® channel support system
40
85
40
130
40
130
40
175
cantilever arms
Cantilever arms are supplied singly without fasteners
Cantilever arms conform to BS 6946
■ Dimensions and weights
Cantilever arms
8 mm backplate
5 mm for S finish
Maximum
Unit Arm uniformly Max. point load
weight length distributed at outer end
Cat. Nos. (kg) (mm) load (kgf)
SA750 0·64 150 350
SA751 0·85 225 350
SA752 1·03 300 304 152
SA753 1·42 450 202 101
SA754 1·81 600 150 75
SA755 2·20 750 110 55
SA757 2·60 900 90 45
Values assume the ladder or other loading medium is rigidly fixed to
cantilever arm
(1) Based upon a load factor of 1·6 for hot dipped galvanised unrestrained condition as
specified in BS EN 1993-1-3 : 2006
(2) Slip limits loading capacity
(3) Load limit is 50%
(1)
(kgf)
(2) (3)
303
(3)
198
(1)
■ Dimensions and weights (continued)
Cantilever arms, side
Unit Arm
weight length
Cat. Nos. (kg) (mm)
SA790 0·64 150
SA791 0·85 225
SA792 1·03 300
SA793 1·42 450
SA794 1·81 600
SA795 2·20 750
SA796 2·60 900
Cantilever arms, double channel
8 mm backplate
5 mm for S finish
Cantilever arms, universal
8 mm backplate
5 mm for S finish
Maximum
Unit Arm uniformly Point load
weight length distributed at outer end
Cat. Nos. (kg) (mm) load (kgf)
SA760 0·64 150 700
(1)
(kgf)
(2)
350
(1)
SA761 0·85 225 456 228
SA762 1·03 300 350 175
SA763 1·42 450 230 115
SA764 1·81 600 170 85
SA765 2·20 750 136 68
SA766 2·60 900 110 55
Values assume the ladder or other loading medium is rigidly fixed to
cantilever arm
(1) Based upon a load factor of 1·6 for hot dipped galvanised unrestrained condition as
specified in BS EN 1993-1-3 : 2006
(2) Load limit is 50%
8 mm backplate
5 mm for S finish
Maximum
Unit Arm uniformly Point load
weight length distributed at outer end
Cat. Nos. (kg) (mm) load (kgf)
SA770 1·14 150 700
SA771 1·68 225 700
(1)
(kgf)
(2)(3)
648
(2)(3)
420
(1)
SA772 2·02 300 650 325
SA773 2·90 450 430 215
SA774 3·78 600 320 160
SA775 4·66 750 250 125
SA776 5·60 900 200 100
Values assume the ladder or other loading medium is rigidly fixed to
cantilever arm
(1) Based upon a load factor of 1·6 for hot dipped galvanised unrestrained condition as specified
in BS EN 1993-1-3 : 2006
(2) Slip limits loading capacity
(3) Load limit is 50%
102
All dimensions (mm) are nominal
103
Swiftrack® channel support system
cantilever arms (continued)
200
50
160
channel
40
20
14·5
Setscrew
Bracket
Channel
Channel nut
W
W
Uniformly
distributed
load over
part of arm
Treat as a point load
applied at mid-point
z m
U kg
y m
x m
V kg
W kg
Total bending moment =
(Uz + Vy + Wx) kgm
Load
W kg
x m
Bending moment = Wx kgm
■ Dimensions and weights (continued)
Cantilever arm bracket SA 756
Horizontal arm section from 3 mm steel only
Weight each (kg) : 1·13
Weights
All weights given are in kilograms (kg) based on nominal thickness and
standard finish
Loads
Maximum uniformly distributed loads for individual cantilever arms
are given with the illustrations in this catalogue. However, should
the loading not be uniform then the safe limit can be obtained by
calculating the bending moment produced by the intended loads and
comparing this with the maximum permissible bending moment for the
relevant arm
45 kgf.m for SA750 – SA755 and SA757
52 kgf.m for SA760 – SA766
95 kgf.m for SA770 –- SA776
To obtain the bending moment resulting from any point load, multiply
the size of the load by its distance from the inner end of the arm
(see illustration A)
If several point loads exist then the total bending moment will be the
sum of the individual bending moment produced by each point load
(see illustration B)
If some part of the total load applied to an arm is uniformly distributed
along a section of the arm only, then this part load can be treated as
a point load acting at the mid-point of that section of arm to which it is
applied (see illustration C)
Illustration A
■ Finishes and standards
The standard finish for all cantilever arms is hot dip galvanised steel to
BS EN ISO 1461
Stainless steel to
BS EN 10088 : Grade 1.4404 (equivalent to S316L31)
is also available as an alternative where applicable
■ Assembly
Fasteners (not included)
Cantilever arms to Swiftrack channel
Cantilever arm
back plate
Standard fasteners for Swiftrack are high tensile hexagon head
setscrews to BS 3692-8.8, these being zinc plated to BS 3382: Part 2
Most standard Swiftrack brackets are made from 5 or 6 mm gauge steel
Standard cantilever arm backplates are made from 8 mm gauge steel
The use of too long a fastener will prevent proper tightening because
the bolt end will foul the bottom of the channel before the head tightens
down on the fitting
When fastening brackets other than Swiftrack, longer bolts may be
required if the bracket thickness is greater than 8 mm
Channel Backplate
type thickness
Deep channel 6-8 mm M10 or M12 x 35
SC400 series 5-6 mm M10 or M12 x 25
Shallow channel 7-8 mm M10 or M12 x 25
SC200 series 5-6 mm M10 or M12 x 20
Recommended
fasteners
Illustration B
Illustration C
Values assume the ladder or other loading medium is rigidly fixed to
cantilever arm
Stainless steel cantilever arms
Loads are 60% of those given in the tables, except for those marked
(3), in the tables opposite,
where the limit is 50%
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