Installation Typicals - Fastening on Steel Threaded Studs

Application
• Fastening of cable trays, pipes on a horizontal, braced cantilever support, fastened
on a vertical structure
• Support is fastened by two / four fasteners on both support and brace baseplate
• L1 is the distance of the load center to the vertical structure surface
• x is the distance of the baseplates (and of brace joint to vertical structure surface)
• The angle of the brace is assumed to be 45°
• Load F is the acceptable total load (all dead load including)
Boundary conditions and assumptions
• Results of calculation are ONLY reflecting capacity of Hilti
fasteners. Structural analysis of support / base structure is
NOT in Hilti scope.
• All typicals calculations are based on the capacity that is
mentioned in the description of the fasteners — please refer
to the respective detailed technical description. Results
are rounded for simplification and to harmonize metric and
imperial units.
• Load case: acceptable load F is acting in the center
of the cable tray, pipe in a distance of L1 to the
support structure.
• Assumption: calculation is based on rigid system model,
without deformation of baseplate or cantilever.
• Assumption: the shear loads in top and bottom baseplate
are assumed to be carried only by the threaded stud(s)
which also carry the tensile load, this is therefore a
worst-case scenario.
• Assumption: considered loadings are only the static loads
of the cable tray, pipe or other installed elements and the
weight of the support itself. The load is always acting in
the center of the cable tray, pipe or installed elements,
the dimension L1 is from that point to the fasteners
plane — please see the description in the respective
examples. No other loads (e.g. wind load or loads due to
installation / transportation) are known and in scope of
the calculation.
• Assumption: there is no load in axis of the cable tray or
pipe due to thermal expansion or other phenomena.
BRACED CANTILEVER
126Issued August 2018, expiry January 2022