Installation Typicals - Fastening on Steel Threaded Studs

Application
• Fastening of cable trays, pipes on a T-Post, which is fastened on a
horizontal structure
• Support is fastened by two / four fasteners (distance x)
• L1 is the total width of the T-Post, L2 is fix set to 1000 mm
• 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 A: 30% of acceptable load F is acting as shear
load, perpendicular to the cable tray axis (F is not yet
applied, as worst-case).
• Load case B: Load F is introduced asymmetrically, acting in
the center of one of the upper arms of the T-Post.
• Assumption: calculation is based on rigid system model,
without deformation of baseplate or cantilever.
• Assumption: shear loads in 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. 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.
T-POST (FLOOR)
127Issued August 2018, expiry January 2022