S-BT Threaded Fastener Specification
Table Of Contents
- 1.1 Definition
- 1.2 The S-BT system
- 1.3 Fastening mechanism
- 1.4 S-BT system features and benefits – simplified fastening to steel
- 2.1 Grating fastening system
- 2.2 Grating fastening system X-FCS-R
- 2.3 S-BT with MM and MQ installation channel system
- 2.4 Fastening instrumentation, junction boxes and lighting
- 2.5 Fastening cable / conduit connectors
- 2.5 Fastening cable tray supports
- 2.7 Electrical connections
- 3.1 Product data
- 3.2 Load data
- 4.1 Instruction for use - S-BT-MF M6, M8, M10, W6, W10
- 4.2 Instruction for use - S-BT-MF M8/7 AN 6
- 4.3 Instruction for use - S-BT-MR M6, M8, M10, W6, W10 SN 6
- 4.4 Instruction for use - S-BT-MR M8/7 SN 6
- 4.5 Instruction for use - S-BT-MR M6, M8, M10, W6, W10 SN 6 AL
- 4.6 Instruction for use - S-BT-MR M8/7 SN 6 AL
- 4.7 Instruction for use - S-BT-GF M8/7 AN 6
- 4.8 Instruction for use - S-BT-GR M8/7 SN 6
- 4.9 Instruction for use - S-BT-GR M8/7 SN 6 AL
- 4.10 Instruction for use – S-BT-EF M6/W6/M8
- 4.11 Instruction for use – S-BT-EF M10/W10
- 4.12 Instruction for use – S-BT-ER M6/W6/M8
- 4.13 Instruction for use – S-BT-ER M10/W10
- 4.14 Instruction for use – S-BT-EF W10 HC AWG2/0 and S-BT-EF M10 HC 35/120
- 4.15 Instruction for use – S-BT-ER W10 HC AWG2/0 and S-BT-ER M10 HC 35/120
- 5.1 Nomenclature and symbols
- 5.2 Design concepts
- 5.3 Static capacity of the S-BT threaded stud
- 5.4 Vibration effects on S-BT threaded stud fastenings
- 5.5 Resistance of S-BT fastenings under dynamic tensile loading
- 5.6 Effect of S-BT threaded stud fastenings on the fatigue strength of base material structural steel
- 5.7 Influence of glue coatings on the loosening torque
- 5.8 S-BT-ER and S-BT-EF screw-in threaded studs for electrical connections
- 5.9.5 Conductivity disc of S-BT-ER / -EF electrical connectors
- 5.9.4 Stainless steel S-BT studs
- 5.9.3 Carbon steel S-BT studs
- 5.9.2 Galvanic (contact) corrosion
Specifications page 31
S-BT Screw-in threaded studs
Conditions for recommended loads and design loads:
• Thedesignresistancecanbeusedforthedesignaccordingthepartialsafety
concept,e.g.EN1993-1-1(Eurocode3).
• GlobalfactorofsafetyΩresp.partialfactorofsafetyγ
m
(basedon5%fractileultimatetestvalue)
Recommended loads Design loads
staticpull-out 2.80 2.00
staticshear 2.80 2.00
• Minimumedgedistance=15mm[0.59"],spacing≥18mm[0.709"]
•
Effectofbasemetalvibrationandstress(e.g.areaswithtensilestress)considered.
• Redundancy(multiplefastening)mustbeprovided.
• Maximumdisplacementindirectionoftheshearforce≤2.0mm[0.08"]
3.2.7 Recommendedinteractionformulaforcombinedloading–
steel and aluminum base materials
V–N(shearandtension)
V
V
rec
+
N
N
rec
≤1.0with
V
V
rec
≤1.0and
N
N
rec
≤1.0
V–M(shearandbending)
V
V
rec
+
M
M
rec
≤1.0with
V
V
rec
≤1.0and
M
M
rec
≤1.0
N–M(tensionandbending)
N
N
rec
+
M
M
rec
≤1.0
V–N–M(shear,tensionandbending)
V
V
rec
+
N
N
rec
+
M
M
rec
≤1.0
3.2.8 Base material thickness t
II
and type of bore hole
Pilot hole Drill through hole
Basematerialthickness
steelandaluminum:
t
II
≥6mm[0.24"]
Basematerialthickness
steel:3mm[0.12"]≤t
II
<6mm[0.24"]
aluminum:5mm[0.20"]≤t
II
<6mm[0.24"]
t
ll
t
ll
Thicknessofbasematerialcorrosionprotectionlayer≤0.8mm[0.0315"].
Forthickercoatings,pleasecontactHilti.
Base material
corrosion protection
layer