Installation Typicals - Fastening on Steel Threaded Studs
Application Example — Use Case D
F
L1
x
RL
F1
F2
(F3)
(F4)
Outset situation
• x = 175 mm (existing cantilever supports)
• L1 = 400 mm (required position of the cable tray, existing cantilever supports)
• F is 100 kg
Task
How many fasteners (e.g. X-BT-MR) are required (2 or 4 supported by the existing
cantilever supports)
Solution
Step 1: select the typicals
slide for the right application
and number of fasteners
(here you need 2 and 4 studs)
Follow the steps 1 – 4
through for both cases
“2 X-BT-MR” and “4 X-BT-MR”
Step 2: select the table
(preferred one for this task
is the table which gives
“F” as result)
Step 3: select the appropriate
column with the lever arm
length L1 (which is equal or
greater than the given length)
Step 4: select the appropriate
row with the support distance
x (which is equal or smaller
than the given support distance)
Result: the maximum load is
140 kg (2 X-BT-MR). You can
use 2 X-BT-MR with the given
load 100 kg
L1 x F RL
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✓ ✓ ✓
✓
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✓ ✓
✓ ✓
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✓
✓ ✓ ✓
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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:
Load
F [kg]
L1 [m m]
150 200 250 400 600 800 1000 1200
x
[mm]
80
160 130 110 70 45 35 25 20
100
185 155 130 90 60 45 35 30
125
215 180 155 105 75 55 45 35
150
235 200 175 125 90 65 55 45
175
255 220 190 140 100 80 60 50
200
275 235 210 155 110 90 70 60
USE CASES IN DETAIL
Use Case D: determine required fastener
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
S–BT
R
4 X-BT-MR: F is 280 kg
2 X-BT-MR: F is 140 kg → 2 X-BT-MR
3
4
R
11Issued August 2018, expiry January 2022