Installation Typicals - Fastening on Steel Threaded Studs
Application Example — Use Case A
F
L1
x
RL
F1
F2
(F3)
(F4)
Outset situation
• Cable tray type 450 W x 50 H; span s = 2.2 m → results in load of 140 kg per
support (example table: 2.2 m x 63.63 kg/m)
• N is defined by 4 fasteners (e.g. X-BT-MR)
• x = 175 mm (baseplates are already available and by thus the distance x
is already given)
Task
The lever-arm length should be as long as possible to gain flexibility. It needs
to be at least 0.3 m
Solution
Step 1: select the typicals
slide for the right application
and number of fasteners
(2 or 4 studs)
Step 2: select the table
(preferred one for this task is
the table which gives “L1”
as result)
Step 3: select the appropriate
column with the load F (which
is equal or greater than the
given load)
Step 4: select the appropriate
row with the support distance x
(which is equal or smaller than
the given support distance)
Result: x = 855 mm the
maximum length L1 is 380 mm
L1 x F RL
?
✓ ✓ ✓
✓
?
✓ ✓
✓ ✓
?
✓
✓ ✓ ✓
?
F1 – F4 fasteners
F load on the support
RL resulting load
(tensile and shear load)
L1 support lever length
x support basis
(=distance of fasteners)
Result:
L1 [mm]
F [kg]
50 75 100 125 150 200 250 300
→ Load in [kN] 0.49 0.74 0.98 1.23 1.47 1.96 2.45 2.94
x
[mm]
80
1170 780 585 465 390 285 210 165
100
1465 975 730 585 485 355 265 205
125
1830 1220 915 730 610 445 335 260
150
2200 1465 110 0 880 730 530 400 310
175
2565 1710 1280 1025 855 620 470 365
200
2935 1955 1465 1170 975 710 535 415
USE CASES IN DETAIL
Use Case A: maximize L1 and achieve a required length
FASTENER OVERVIEWFASTENE R SYSTEM
APPLICATION OVERVIE W
DISCLAIMERHOW TO USE T HIS DOCU MENTFASTENE R TECHN ICAL DETAI LS
x
x
2 studs
4 studs
Application
• Fastening of cable trays, pipes on a horizontal cantilever support, fastened on
a vertical structure
• Support is fastened by two / four X-BT-MR on both support and brace
baseplate with distance x
• L1 is the distance of the load center to the ver tical structure sur face
• Load F is the acceptable total load (all dead load including)
Boundary conditions
• These values are ONLY reflecting capacity of X-BT-MR threaded stud.
Structural analysis of support / structure is NOT in Hilti scope. See the
detailed statements in disclaimer — 2018/05/04
• Shear load fully carried by one / two top X-BT-MR (worst-case)
• Load F acting at the distance of L1 from structure surface
DOWNLOAD D RAWIN GS (PDF) D OWNLOAD D RAWING S (DWG)
Resul t:
L1 [ m m]
F [kg]
50 75 100 125 150 200 250 300
→ Load in [kN] 0.49 0. 74 0.98 1.23 1.47 1.96 2.45 2.94
x
[mm]
80
1170 780 585 465 390 285 210 16 5
100
146 5 975 730 585 485 355 265 205
125
183 0 12 20 915 73 0 610 445 335 260
150
2200 14 65 1100 880 730 530 40 0 3 10
175
2565 1710 1280 10 25 855 620 470 365
200
2935 195 5 146 5 1170 975 710 535 415
Resul t:
Load
F [kg]
L1 [ m m]
150 20 0 250 400 600 800 1000 120 0
x
[mm]
80
320 260 220 14 5 95 70 55 45
100
375 310 260 180 12 0 90 70 60
125
430 360 310 2 15 150 110 90 75
150
475 405 350 250 18 0 135 11 0 90
175
515 440 385 280 205 160 125 105
200
550 47 5 420 310 225 18 0 145 120
Resul t:
Load
F [kg]
L1 [ m m]
150 20 0 250 400 600 800 1000 120 0
x
[mm]
80
160 13 0 110 70 45 35 25 20
100
185 15 5 130 90 60 45 35 30
125
215 18 0 15 5 105 75 55 45 35
150
235 200 175 125 90 65 55 45
175
255 220 190 14 0 10 0 80 60 50
200
275 235 210 155 110 90 70 60
Resul t:
L1 [ m m]
F [kg]
50 75 100 125 150 200 250 300
→ Load in [kN] 0.49 0. 74 0.98 1.23 1.47 1.96 2.45 2.94
x
[mm]
80
585 390 285 210 165 10 5 70 50
100
730 485 355 265 205 13 5 90 60
125
915 610 445 335 260 170 11 5 75
150
110 0 73 0 530 400 310 200 135 90
175
1280 855 620 470 365 235 16 0 11 0
200
146 5 975 710 5 35 41 5 270 18 0 125
FASTENING CANTILEVER SUPPORT
WITH X-BT-MR*
Two / Four X-BT-MR Threaded studs
NOTE: load capacity used for calculation N
rec
= 3.6 kN (axial) / V
rec
= 4.3 kN (shear)
Technical assessment — ma ximum of F (depending on load F or lever arm length L1 and baseplate distance x)
X-BT-MR • Metric
*X-BT-MR is the new generation X-BT
15Issued A ugust 2018, expi ry Janu ary 2021
1
1
2
3
4
R
R
L1 is 855 mm — meets requirement
8Issued August 2018, expiry January 2022