BV Type Approval 45116/B0_BV for S-BT-MR / -MF, S-BT-GR / -GF, S-BT-ER / -EF, X-FCM-R_(NG), X-FCM-M-(NG) and X-FCS-R fastening system in off-shore and shipbuilding application
4. APPLICATION / LIMITATION:
4.1 The mechanical fastening system is intended for fastening applications in shipbuilding, offshore and crane structures as far
as the BUREAU VERITAS Rules are complied with:
- Metal and fiberglass grating
- Cable, conduit and tubing connectors
- Trays, channels and struts for cable, conduit and tubing runs
- Instrumentation, junction boxes, lighting
- Pipe hangers
- Signage
- Door frames
- Mounting cabinets, securing furniture, utensils, etc.
- Earthing (Grounding), bonding (e.g. for equipment, pipe flanges, storage tanks, junction boxes etc.) to. coated steel and to
structural steel according to EN 100025 (S235, S275, S355).
4.2 The thickness of the base material is 3 mm ≤ t < 6 mm (steel) and 5 mm ≤ t < 6 mm (aluminium) for pre-drilled through
holes and t ≥ 6 mm (steel and aluminium) for fasteners intended to be set in pre-drilled pilot holes.
4.3 The thickness of the fastened material is for the S-BT M8 studs ≤ 7 mm and ≤ 15 mm respectively and for the S-BT M10 /
S-BT W10 ≤ 15 mm.
The minimum thickness of the fastened material is 1.6 mm.
4.4 The minimum distance to the edge of a flange or cutout is not to be less than 6 mm and the minimum spacing between
fasteners is not to be less than 18 mm for all S-BT M8 and 22 mm for all S-BT M10 / S-BT W10.
4.5 The minimum tensile strength of the steel base material is not to be less than 340 N/mm² and not to be less than 270 N/mm²
for aluminium base material. The maximum tensile strength of the steel base material is not to be more than 630 N/mm².
4.6 No limits with regards to the thickness of the base material.
4.7 The S-BT fastening system may be used in areas where drilling into the base material is permissible.
4.8 The maximum tightening torque of grating disc or nut fitted to the threaded fastener is not to be more than 5 Nm (steel base
material thickness 3 mm ≤ t < 6 mm and aluminium) and not to be more than 8 Nm for steel base material thickness
t ≥ 6 mm.
4.9 The S-BT fasteners are allowed to be used on structural members made from carbon steel that require fatigue verification.
Fatigue verification of structural members in ship structures has to be made with the corresponding BUREAU VERITAS
Rules and is subject to special consideration of BUREAU VERITAS.
Fatigue verification of crane-structures are to be made in compliance with Eurocode 3 (EN 1993-1-9: Eurocode 3: Design
of Steel structures – Part 1.9: Fatigue). For fatigue verification of normal stresses the detail category 100 (m=5) according
to EN 1993-1-9 applies.
Description of constructional detail:
Hilti S-BT screw-in stainless and carbon steel threaded studs with pre-drilled hole in structural steel base material.
Imperfect fastener installations as e.g. overwound or pulled-out fasteners are covered.
The nominal stress range [N/mm²] is to be calculated by the gross cross-section fulfilling the requirements of the nominal
stress approach.
Plate thickness: t ≥ 3 mm; minimum edge distance: 15 mm; minimum spacing of fasteners: 18 mm; structural steel grades:
S235 up to S355 grades according to EN 10025-2, EN 10025-3 and EN 10225.
For fatigue verification in compliance with BUREAU VERITAS, the fatigue S-N curve “S-BT”, as described in the “Hilti
S-BT screw-in threaded studs – Specification binder”, shall be used. This curve applies for base material thickness ≥ 3 mm,
edge distance ≥ 15 mm. This is applicable for structural steel grades with nominal yield strength ranging from 235 MPa to
355 MPa.
4.10 The manufacturer’s assembly instructions and recommendations are to be complied with.
The grating fasteners X-FCM, X-FCM-M and X-FCM-R may also be used in combination with Hilti X-BT fasteners
covered by BUREAU VERITAS Type Approval Certificate N° 54054.
5. PRODUCTION SURVEY REQUIREMENTS:
5.1 The mechanical fastening system are to be supplied by Hilti Corporation in compliance with the type described in this
certificate.
Page 4 / 5
Certificate number: 45116/B0 BV
The electronic version is available at: http://www.veristarnb.com/veristarnb/jsp/viewPublicPdfTypec.jsp?id=lky9pzfepr
BV Mod. Ad.E 530 June 2017 This certificate consists of 5 page(s)