CharacteristicsBIT included, concealed joints, timber-metal connections
SizesDiameter: 7,5 mm, Length: from 55 mm to 235 mm
SBD is a self-drilling dowel from Rothoblaas designed for timber-steel joints. The special self-perforating timber-metal tip geometry reduces the possibility of breakage. The cylindrical countersunk head ensures an optimal appearance and meets fire-resistance requisites.
The diameter of 7,5 mm ensures a shear resistance of over 15 % and enables optimization of the number of fasteners.
The thread up against the tip (b1) facilitates screwing. The increased length of the under head thread (b2) makes for fast, accurate closure.
Fields of Use
Self-drilling system for concealed timber-steel joints. Can be used with screw guns running at 600-1500 rpm with:
- steel S235 ≤ 10,0 mm
- steel S275 ≤ 8.0 mm
- steel S355 ≤ 6.0 mm
- Alumini, Alumidi and Alumaxi brackets Service classes 1 and 2
- Knee Beam
Ideal for joining head beams and making continuous beams, restoring shear forces and momentum. The small dowel diameter guarantees joints that offer high stiffness.
- Moment Resisting Joint
Also certified, tested and calculated for fastening standard Rothoblaas plates such as the TYP X pillar-holder.