Bolted Rail Fixing Clips

Bolting is the best understood method of joining items and does not need the skills and qualification required for welding. Grade 8.8 bolts offer good resistance to forces from rails.

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  • Suitable for lighter applications
  • Economical choice
  • Can carry the highest loads when used with two M24 bolts

Welded Rail Fixing Clips

Welded clips allow all the work to be done from above the runway beam. These clips carry high forces from rails with relatively small size clips.

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  • High load carrying capacity
  • Suitable for heavy duty industries
  • Available for any size of rail from largest to smallest

Crane Rail Fixing Clips

Crane Rail Fixing Clip

Crane rails need to be installed to fine tolerances. Our designs of infinitely adjustable clips allow very precise alignment of rails. The clips are also designed to carry the very high forces the cranes can apply to the rails. With types that can be bolted and others that can be welded, you have the choice of most appropriate installation method for your needs.

Gantrail self locking crane rail clips are designed to align and securely fix the rail. The elastomer ‘nose’ applies a controlled force to the rail to restrain excessive movement.

They must:

Size for size welded clips give a stronger installation but bolted clips are often more convenient.

  1. Find or estimate the horizontal force to be carried by the clip. It is assumed that all of the load from one wheel will occur at one clip. If the load is not known it may be assumed to be 15% of the vertical wheel load.
  2. Choose the style of clip you require – bolted or welded. These are identified with their respective strengths in the table below.
  3. Find the dimensions of the foot of the rail to be used. See Crane Rails.
  4. Check that the selected clip will fit the installation. The table gives the dimension that must be added to the foot width of the rail to give the minimum support width.
  5. Check that the other clip dimensions will suit the application by referring to the Gantrail data sheet for the clip. These only show a limited number of rail sections and Gantrail can advise on other sections.

The choice between bolted clips and those with welded lower components is often based on industry practice and preference. The bolted clips are economical but size for size they are rated significantly lower on load carrying capacity. Thus heavy duty industries such as steel and aluminium manufacture tend to use welded base 8 or 9 series clips whereas lighter applications such as industrial buildings and high bay warehouses use 3, 6 or 7 series clips that are fixed by bolting. Gantrail are always happy to give guidance on this matter.

It is assumed that grade 8.8 bolts will be used. If welded studs or grade 4.6 bolts are used then their strength is only taken as 40% of grade 8.8 bolts.

Bolted Fixing Clip Strengths

Clip Name Horizontal Force Capacity (Grade 8.8 bolts) Horizontal Force Capacity (Grade 10.9 bolts) Dimension to be added to Rail Foot (Minimum mounting width) Download Data Sheet
3112/10 21kN - 92mm Download Data Sheet
3116/10 38kN 50kN 100mm Download Data Sheet
3120/15 75kN 100kN 147mm Download Data Sheet
3124/15 125kN 140kN 150mm Download Data Sheet
3124/20 125kN 140kN 170mm Download Data Sheet
3224/20 250kN - 170mm Download Data Sheet
3226/15 250kN - 150mm Download Data Sheet
6124/20 125kN - 149mm Download Data Sheet
7120/10 75kN 100kN 95mm Download Data Sheet

Welded Fixing Clip Strengths

Clip Name Horizontal Force Capacity Dimension to be added to Rail Foot (Minimum mounting width) Download Data Sheet
1116/15 120kN 100mm Download Data Sheet
1120/12 120kN 100mm Download Data Sheet
1120/15 120kN 104mm Download Data Sheet
1120/21 165kN 130mm Download Data Sheet
1216/15 165kN 100mm Download Data Sheet
1220/20 235kN 130mm Download Data Sheet
1220/21 300kN 130mm Download Data Sheet
2119/15 120kN 138mm Download Data Sheet
2219/20 235kN 140mm Download Data Sheet
8119/15 120kN 166mm Download Data Sheet
8219/20 200kN 187mm Download Data Sheet


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