Throughbolts ZYP Technical Data

The throughbolt is a through fixing designed for medium duty applications in sold concrete. The drill hole diameter in the concrete is the same as the thread diameter. The hole into the concrete is drilled through a pre-drilled clearance hole in the fixture and with the fixture in situ. They are finished in Bright Zinc Plate and Yellow Passivated to a minimum of 5µm. They are suitable for use in concrete over 20N/mm².

Typical applications include holding down bolts for Machinery, Racking, Stadium Seating, Safety Fences, Wall Brackets, Balustrading and Suspension Brackets.

Installation Instructions

1 – Position fixture and drill correct diameter hole to minimum recommended depth through the fixture

2 – Clean hole by brushing and blowing to remove drilling debris and dust

3 – Insert the Throughbolt through the fixture into the drilled hole

4 – Tighten the anchor to the recommended Torque

When embedded normally, the specifications are as follows:

Spec Dimensions M6 M8 M10 M12 M16 M20 M24
Thread Diam mm 6 8 10 12 16 20 24
Drill Hole Diam mm 6 8 10 12 16 20 24
Clearance Hole Diam mm 7 9 12 14 18 22 26
Min. Hole Depth mm 35 40 50 65 85 100 120
Min. Embedment Depth mm 30 35 45 60 75 85 105
Min. Structure Thickness mm 50 50 70 95 110 130 160
Ultimate Tensile Strength N/mm2 500 500 500 500 400 400 400
Yield Strength N/mm2 400 400 400 400 240 240 240
Rec. Tightening Torque Nm 6 10 28 34 85 160 380
Characteristic Tensile Load kN 5.4 6.0 9.6 15.0 19.8 26.1 34.2
Rec. Tensile Load kN 1.8 2 3.2 5 6.6 8.7 11.4
Characteristic Shear Load kN 5.8 10.5 16.5 24 35.8 55.8 80.3
Rec. Shear Load kN 2.3 4.2 6.6 9.6 14.3 22.3 32.1
Minimum Spacing mm 70 75 105 140 165 195 240
Minimum Edge Distance mm 50 50 55 70 85 100 120

When embedded DEEPLY, the specifications change to:

Spec Dimensions M6 M8 M10 M12 M16 M20 M24
Thread Diam mm 6 8 10 12 16 20 24
Drill Hole Diam mm 6 8 10 12 16 20 24
Clearance Hole Diam mm 7 9 12 14 18 22 26
Min. Hole Depth mm 55 60 70 85 120 135 195
Min. Embedment Depth mm 50 55 65 80 110 123 180
Min. Structure Thickness mm 100 100 110 135 180 205 300
Ultimate Tensile Strength N/mm2 500 500 500 500 400 400 200
Yield Strength N/mm2 400 400 400 400 240 240 240
Rec. Tightening Torque Nm 6 10 28 34 85 160 380
Rec. Tensile Load kN 2.2 3.4 5.4 7.7 8.5 17.1 23.6
Rec. Shear Load kN 2.3 4.2 6.6 9.6 14.3 22.3 32.1
Minimum Spacing mm 130 145 170 210 300 330 490
Minimum Edge Distance mm 65 75 85 105 150 165 245

Whether embedment is normal or deep, the loads shown in both cases are for 30N/mm² concrete. Shear loads are away from a free edge

When specifiying a throughbolt, please use the following tables to see the various options available for each thread size:

For throughbolts with a 6mm thread diameter, the nut will be 10 mm across the flat (A/F), and they are available in the following variations:

Anchor Length (mm) 45 55 85
Maximum fixture thickness (mm) 5 15 45
Thread Length (mm) 20 30 60

For throughbolts with a 8mm thread diameter, the nut will be 13 mm across the flat (A/F), and they are available in the following variations:

Anchor Length (mm) 50 65 80 100 130
Maximum Fixture Thickness (mm) 5 20 35 55 85
Thread Length (mm) 20 35 50 70 85

For throughbolts with a 10mm thread diameter, the nut will be 17 mm across the flat (A/F), and they are available in the following variations:

Anchor Length (mm) 65 75 90 120
Maximum Fixture Thickness (mm) 8 18 33 63
Thread Length (mm) 25 35 50 80

For throughbolts with a 12mm thread diameter, the nut will be 19 mm across the flat (A/F), and they are available in the following variations:

Anchor Length (mm) 80 100 120 140 180
Maximum Fixture Thickness (mm) 5 25 45 65 105
Thread Length (mm) 30 50 70 90 90

For throughbolts with a 16mm thread diameter, the nut will be 24 mm across the flat (A/F), and they are available in the following variations:

Anchor Length (mm) 105 125 150 175
Maximum Fixture Thickness (mm) 10 30 55 80
Thread Length (mm) 60 65 90 90

For throughbolts with a 20mm thread diameter, the nut will be 30 mm across the flat (A/F), and they are available in the following variations:

Anchor Length (mm) 130 160 215
Maximum Fixture Thickness (mm) 20 50 105
Thread Length (mm) 60 60 60

For throughbolts with a 24mm thread diameter, the nut will be 36 mm across the flat (A/F), and they are available in the following variations:

Anchor Length (mm) 180 240
Maximum Fixture Thickness (mm) 45 125
Thread Length (mm) 65 65