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X-U
Fastening of wood to steel:
Application requirements
Thickness of base material
Concrete:
hmin = 80 mm
Thickness of fastened material
Wood:
Nrec Vrec
Design conditions:
• For safety relevant fastenings sufficient redundancy of the entire system is required.
• In case soft material is fastened, its strength determines the loads.
• To limit penetration of nail and to increase pullover load, use nails with washers.
Test data
Important note: Test data are for information only and can’t be used for design. These data
are examples and not representing the whole range of applications and load cases.
Recommended loads are in conjunction with allowable sheet thicknesses and overlap types.
For more detailed information please inquire at Hilti.
Pull-out loads (5% fractile value)
tl = 15–50 mm
Nrec = Vrec = 600 N
Characteristic pull-out loads Base steel thickness Steel strength
Nail Ntest,k [kN] tll [mm] fu [NImm 2 ]
X-U 16 16.8 12.0 535
Pull-over loads (Characteristic values: 5% fractile value)
Softwood (spruce) 0.75 mm steel sheeting 1.5 mm teel sheeting
Nails Ntest,k [kN] Ntest,k [kN] Ntest,k [kN]
X-U 1.6 3.8 8.6
Steel:
tll ≥ 6.0 mm
Steel:
tl ≤ 3 mm (Fastened material not pre-drilled)
tl ≤ 6 mm (Fastened material pre-drilled)
4.88 11 / 2007