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Technical Data

Racking And General Structures

Racking and general structures can be constructed using FastClamp fittings. Care must be taken to ensure that the tube size selected is adequate for the loads anticipated. To help with the selection of the correct tube, Table 1: Horizontal Tube Load Capacity provides the uniformly distributed loads that can be supported between upright posts assuming that the load is supported by two tubes. These loads are calculated based on the maximum bending movement for the tube.

Table 2: Vertical Tube Load Capacity provides the load capacity for single upright posts with various unsupported lengths. These loads are based on the compression strength and buckling loads of the CHS tube.

Table 3 contains our recommendations to safely meet the stated design loads based on the maximum permissible bending moment of the upright tube.

NB. When designing structures care must be taken to ensure that the load on any one grub screw does not exceed 900kg.

For further help in designing structures using FastClamp please contact our sales office.

Horizontal Tubes Load Capacity

Uniformally distributed load in Kg using two horizontal tubes
Tube Ø

Span (metres)
26.9mm x 2.633.7mm x 3.242.4mm x 3.248.3mm x 3.260.3mm x 4.0
0.55401060175023804000
0.6435850140718703250
0.7375730120715952760
0.8330645106313652420
0.929557994612302160
1.026552585011101950
1.124047877010831775
1.22194387059301625
1.32024036518581497
1.41873736047961387
1.51753475647411290
1.63255296931205
1.73064996501129
1.82904726131061
1.9277448581999
2.0268427553987
2.1408528944
2.2391505855
2.3376485818
2.4362467785
2.5349450755
2.6434728
2.7419703
2.8405680
2.9659
3.0639
3.1620
3.2603
3.3588
3.4575
3.5564

Vertical Strut Load Capacity

Vertical load in Kg per strut
Tube Ø
Strut Length (metres)26.9mm x 2.633.7mm x 3.242.4mm x 3.248.3mm x 3.260.3mm x 3.6
0.317202950403847837044
0.414352617370344466661
0.511502284336841096278
0.69101951303337725895
0.77251618269034355512
0.85901348236330985129
0.94801128202827614746
1.0948175224244363
1.1798152421343980
1.2134018843597
1.3118816683253
1.4106614842951
1.513282681
1.62441
1.72226
1.82032
1.91857
2.01697

Guardrail

Guardrail is the most common form of structure that is built with FastClamp fittings and requires careful consideration to meet required design loadings. Design loads are usually specified, however if unsure BS 6399 and BS 6180 are good reference documents.

The loading capacity of any guardrail structure is determined principally by the diameter, thickness and frequency of its Uprights.

This table contains our recommendations to safely meet the stated design loads based on the maximum permissible bending moment of the Upright tube.

Maximum Upright Centres (mm)
Tube Ø
900 mm high
Design Load33.7 x 3.2mm42.4 x 3.2mm42.4 x 4.0mm48.3 x 3.2mm48.3 x 4.0mm
48.3 x 5.0mm
360 N/m81413691595182825843052
740 N/m39666677688912572229
1500 N/m1953293834396201100
1000 mm high
360 N/m73212321435164523262930
740 N/m35659969880011312006
1500 N/m176296345395558990
1000 mm high
360 N/m66611201305149621142778
740 N/m32454563572810281824
1500 N/m160269313359507900
Table 3      

Grade:BS EN 10255 (ISO 65)

Rails need only be 3.2mm thick and the same diameter as the upright.

Call FastClamp on +44 (0)1384 632385 for a FREE quotation and to discuss your project.


Call FastClamp on +44 (0)1384 632385 for a FREE quotation and to discuss your project

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