Through Bolt Anchors: Heavy-Duty, Fast-Install - Why Ours?

Field Notes on Through Bolt Anchors: What’s Changing, What Matters

When crews ask me what I’d spec for a clean, fast fix into concrete, I usually point them to through bolt anchors. The product goes by “Wedge Anchor” globally—an advanced mechanical bolt engineered for cracked and non-cracked concrete. And yes, I’ve seen them survive jobsite abuse that would make a structural engineer wince (not recommending that, just saying).

Origin matters: this line is manufactured in Hanguang Industrial Park, Yongnian District, Handan City, Hebei Province—an area that, frankly, lives and breathes fasteners. The factory DNA shows in consistency and customization options.

Industry Trends (and a few candid observations)

• ETA/ETAG-driven selections: specifiers lean on ACI 355.2 and EAD 330232 now more than ever.
• Material shifts: more A4/316 stainless for coastal projects; HDG for warehouses with aggressive cleaning regimes.
• Traceability: heat-batch IDs and mill certs are increasingly non-negotiable.
• Carbon talk: EPDs are turning from “nice-to-have” to “send it with the submittal.”

Core Specs (quick glance)

The current through bolt anchors range covers carbon steel (8.8/10.9 class) with zinc or hot-dip galvanizing, plus stainless A2/A4. In real-world installs, torque-controlled expansion delivers predictable clamping, even when the hole is a tad dusty (though, please, blow-brush-blow).

Where they’re used (and why)

• Steel baseplates, racking, pipe supports, MEP hangers, façade brackets.
• Machines and conveyors (vibration resistance is the quiet hero here).
• Temporary-to-permanent conversions—contractors like the speed.

Installer feedback? Many say the expansion feel is “predictable,” and, surprisingly, overhead placements go smoother than with sleeves in similar conditions.

Process Flow and Quality

Through bolt anchors manufacturing (condensed):

1. Material selection (certified wire rod, heat-batch traceability)
2. Cold forging and thread rolling
3. Heat treatment (if carbon steel); wedge sleeve machining
4. Surface finishing (Zn, HDG, or SS passivation)
5. Assembly and 100% visual check
6. Testing: proof load, wedge expansion, torque/tension, pull-out in C20/25 and C30/37 per ACI/ETA
7. Packing with QR trace labels

Typical lab snapshots: M12 carbon steel in C25/30 concrete achieves ≈ 20–25 kN tension and ≈ 18–22 kN shear; real-world use may vary by edge distance, spacing, and installation.

Vendor Snapshot (choose what fits the spec, not the logo)

Customization and Cases

For warehouses with corrosive washdowns, we spec A4 with extended embedment; for logistics racking, HDG M12 with longer threads helps adjust baseplate tolerances. One customer (mid-size fabricator) said switching to longer embedment through bolt anchors cut callbacks by half—mostly due to less edge breakout in thin slabs.

Standards, Testing, and Docs

Look for data per ACI 355.2 and ETA EAD 330232. Materials per ISO 898-1 (carbon steel) and ISO 3506 (stainless). Coatings per ASTM B633 or ISO 1461. Submittals usually include MTCs, torque tables, and installation instructions—don’t skip the hole cleaning, seriously.

Authoritative citations

1. ACI 355.2-19: Qualification of Post-Installed Mechanical Anchors in Concrete.
2. EAD 330232-00-0601: Mechanical Fasteners for Use in Concrete (ETA framework).
3. ISO 898-1: Mechanical properties of fasteners—carbon steel and alloy steel bolts.
4. ISO 3506-1: Corrosion-resistant stainless steel fasteners—bolts, screws, studs.
5. ASTM B633 / ISO 1461: Zinc and hot-dip galvanizing coatings.