Installation recommendations for ASSY screws

 Installing 8 mm ASSY screws

Lower density timbers (Spruce-Pine-Fir and Northern Species)

   -No pre drilling required for d = 8 mm screws up to 580 mm length

Higher density timbers (Hem-Fir, D-Fir-Larch)

   -No pre drilling required for d = 8 mm screws up to 480 mm length

   -Pre drilling suggested for d = 8 mm and l > 480 mm

Pre drill with ≈ 0.7*d (5.5 mm or 3/16”) for 20% of screw length

Old growth timbers and aged wood (Douglas Fir and Hemlock)

   -No pre drilling required for d = 8 mm screws up to 400 mm length

   -Pre drilling suggested for d = 8 mm and l > 400 mm

Pre drill with ≈ 0.7*d (5.5 mm or 3/16”) for 25% of screw length

Engineered wood products (LVL, PSL)

   -No pre drilling required for d = 8 mm screws up to 340 mm length

   -Pre drilling suggested for d = 8 mm and l > 340 mm

Pre drill with ≈ 0.7*d (5.5 mm or 3/16”) for 25% of screw length

Suggested Machinery

   -Use low rpm drill with high torque

   -Do not use impact drills

   -Use AW drive bits for all ASSY screws

   -Use drill with torque clutch

During installation

   -Do not stop drill during installation. ASSY screws shall be installed without stopping in one run

   -Wear safety glasses and safety gear

   -Secure stand on solid ground is required

   -Use drill with clutch when installing screws in steel to wood connections. Sudden torque increase may       cause injuries if no proper torque regulating drill with clutch is used!

Note:

d= screw diameter in mm

l = screw length in mm

Pre drilling may reduce withdrawal capacity of screw. Consult with structural engineer before pre-drilling.

For more info go to My-Ti-Con.com

Installation recommendations for ASSY screws

Installing 10 mm ASSY screws

Lower density timbers (Spruce-Pine-Fir and Northern Species)

   -No pre drilling required for d = 10 mm screws up to 530 mm length

   -Pre drilling suggested for d = 10 mm and l > 530 mm

Pre drill with ≈ 0.7*d (7 mm or 1/4”) for 20% of screw length

Higher density timbers (Hem-Fir, D-Fir-Larch)

   -No pre drilling required for d = 10 mm screws up to 440 mm length

   -Pre drilling suggested for d = 10 mm and l > 440 mm

Pre drill with ≈ 0.7*d (7 mm or 1/4”) for 20% of screw length

Old growth timbers and aged wood (Douglas Fir and Hemlock)

   -No pre drilling required for d = 10 mm screws up to 360 mm length

   -Pre drilling suggested for d = 10 mm and l > 360 mm

Pre drill with ≈ 0.7*d (7 mm or 1/4”) for 25% of screw length

Engineered wood products (LVL, PSL)

   -No pre drilling required for d = 10 mm screws up to 320 mm length

   -Pre drilling suggested for d = 10 mm and l > 320 mm

Pre drill with ≈ 0.7*d (7 mm or 1/4”) for 25% of screw length

Suggested Machinery

   -Use low rpm drill with high torque

   -Do not use impact drills

   -Use AW drive bits for all ASSY screws

   -Use drill with torque clutch

During installation

   -Do not stop drill during installation. ASSY screws shall be installed without stopping in one run

   -Wear safety glasses and safety gear

   -Secure stand on solid ground is required

   -Use drill with clutch when installing screws in steel to wood connections. Sudden torque increase may   cause injuries if no proper torque regulating drill with clutch is used!

Note:

d= screw diameter in mm

l = screw length in mm

Pre drilling may reduce withdrawal capacity of screw. Consult with structural engineer before pre-drilling

Installation recommendations for ASSY screws

Installing 12 mm ASSY screws

Lower density timbers (Spruce-Pine-Fir and Northern Species)

   -No pre drilling required for d = 12 mm screws up to 480 mm length

   -Pre drilling suggested for d = 12 mm and l > 480 mm

Pre drill with ≈ 0.7*d (8.5 mm or 5/16”) for 20% of screw length

Higher density timbers (Hem-Fir, D-Fir-Larch)

   -No pre drilling required for d = 12 mm screws up to 400 mm length

   -Pre drilling suggested for d = 12 mm and l > 400 mm

Pre drill with ≈ 0.7*d (8.5 mm or 5/16”) for 25% of screw length

Old growth timbers and aged wood (Douglas Fir and Hemlock)

   -No pre drilling required for d = 12 mm screws up to 320 mm length

   -Pre drilling suggested for d = 12 mm and l > 320 mm

Pre drill with ≈ 0.7*d (8.5 mm or 5/16”) for 25% of screw length

Engineered wood products (LVL, PSL)

   -No pre drilling required for d = 12 mm screws up to 300 mm length

   -Pre drilling suggested for d = 12 mm and l > 300 mm

Pre drill with ≈ 0.7*d (8.5 mm or 5/16”) for 25% of screw length

Suggested Machinery

   -Use low rpm drill with high torque

   -Do not use impact drills

   -Use AW drive bits for all ASSY screws

   -Use drill with torque clutch

During installation

   -Do not stop drill during installation. ASSY screws shall be installed without stopping in one run

   -Wear safety glasses and safety gear

   -Secure stand on solid ground is required

   -Use drill with clutch when installing screws in steel to wood connections. Sudden torque increase may cause injuries if no proper torque regulating drill with clutch is used!

Note:

d= screw diameter in mm

l = screw length in mm

Pre drilling may reduce withdrawal capacity of screw. Consult with structural engineer

Wedge Washers

The application of self-tapping wood screws in wood-to-wood connection systems and as reinforcement has been done many times in the past decade. The use of self tapping wood screws in steel-to-wood connection systems however has been limited because proper bearing of the screw head, especially for screw angles other 90 degrees has been a concern. CNC machinery was often needed to provide countersunk pre-drilled holes in steel plates for 45° or 30° angles. Our 45° and 30° wedge washer was specially designed to provide a more cost efficient solution for this problem.

Advantages:
No more need to pre-drill steel plates at 45° and 30°
Simply pre-drill at 90°
Only basic machinery required


http://www.my-ti-con.com/data/technical-approvals/Angle%20washer%2045%20degree.pdf

http://www.my-ti-con.com/data/technical-approvals/Angle%20washer_Maik.pdf

The test facility for steel, wood and brick at the University of Karlsruhe (TH) was assigned to investigate the applicability of the angle washer for steel-to-wood connections. The angle washer shall transmit forces between an inclined screw (screw-in angle 45°) and the connected steel plate.

Wedge Washers

The application of sef-tapping wood screws in wood-to-wood connection systems and as reinforcement has been done many times in the past decade. The use of self tapping wood screws in steel-to-wood connection systems however has been limited becasue proper bearing of the screw head, especially for screw angles other 90 degrees has been a concern. CNC machinery was often needed to provide countersunk pre-drilled holes in steel plates for 45° or 30° angles. Our 45° and 30° wedge washer was specially designed to provide a more cost efficient solution for this problem.

Advantages:
No more need to pre-drill steel plates at 45° and 30°
Simply pre-drill at 90°
Only basic machinery required


Follow the links below to see the test data:

http://www.my-ti-con.com/data/technical-approvals/Angle%20washer%2045%20degree.pdf

http://www.my-ti-con.com/data/technical-approvals/Angle%20washer_Maik.pdf

The test facility for steel, wood and brick at the University of Karlsruhe (TH) was assigned to investigate the applicability of the angle washer for steel-to-wood connections. The angle washer shall transmit forces between an inclined screw (screw-in angle 45°) and the connected steel plate.