Precast Concrete T-Bolt Head Anchor for Construction and Tunnel Use

The Qimao Metal Manufacturer Precast Concrete T-Bolt Head Anchor for Construction And Tunnel Use is a high-strength fastener designed for pre-installed channel systems in precast concrete and tunnel lining applications. Its unique T-shaped head allows 90-degree rotation after insertion into hot-rolled C-channels, creating a positive mechanical interlock with the channel lips.

Manufactured from grade 8.8 or 10.9 carbon steel with hot-dip galvanized or zinc plating, it offers excellent corrosion resistance for harsh underground environments. The anchor enables height adjustments along the channel, accommodating installation tolerances without compromising load capacity.

Ideal for securing tunnel brackets, cable trays, pipe hangers, and precast wall connections. Features include anti-rotation ribs, consistent thread quality, and pre-assembled nut/washer options. Meets EN 13121 and ASTM A563 standards. Simple installation – insert, quarter-turn, torque to specification – eliminates welding or drilling in the field.

Product Parameter (Specification)

Product Feature

1-The Precast Concrete T-Bolt Head Anchor for Construction And Tunnel Use matches channel profile, won’t spin during tightening.

2-Finish options: Dacromet or hot-dip galvanized, passes 500+ hours salt spray.

3-Rounded head transition reduces stress points, fatigue life up 30%.

4-Works with standard nuts and washers. Can be installed by hand or with a power tool.

Production Details

The Precast Concrete T-Bolt Head Anchor for Construction And Tunnel Use is machined by steel. Lengths are available from 40mm to 160mm with custom options on request. The T-head stands 5 to 9mm tall and is about one and a half times as wide as the thread diameter, which helps it sit firmly inside the channel without twisting. Every batch goes through magnetic particle inspection before leaving the shop – this catches any tiny cracks that might have formed during the head-forming process. For shipping, the anchors go into moisture-proof cartons with plastic liners inside so the threads don't get banged up in transit.

How To Use:

1. Clean the channel in the precast part – remove all concrete residue.

2. Push the Precast Concrete T-Bolt Head Anchor for Construction And Tunnel Use into the channel opening, then turn 90° until it catches inside.

3. Put on the bracket, washer, and tighten the nut to 120–150 N·m.

4. Check the anchor doesn’t slide. For tunnels, do a pull-out test on random samples