FAAC Welding & Fabrication Nationwide

FAAC Welding & Fabrication: The Chandler Owner’s Guide

FAAC welding and fabrication repair in Chandler typically runs $340-$780 installed, depending on whether we’re rebuilding a hinge bracket on an existing 400-series swing operator or fabricating a new mounting plate for an underground 770 system. We stock FAAC-compatible steel stock, hinge kits, and arm brackets on our Chandler trucks, and most fabrication jobs are completed same-day once the gate is measured and the scope is written. Most owners discover the problem when their gate arm separates at the weld during opening, or when a seasonal temperature swing opens a crack in a bracket that was stress-fractured for months.

Call (520) 827-3159

Which FAAC Models This Applies To

FAAC welding and fabrication needs cluster around three operator families in Chandler. The 400-series swing gate operators (422, 424, 402 SBS) use steel arm brackets that fatigue at the weld joint after roughly 8-12 years in Arizona heat. The 700-series underground systems (770, 741, 844 ER) require custom-fabricated mounting shoes when the original cast housing cracks, which we see frequently in the hard clay soils west of the 101. The 390 sliding gate motors need rack welding or bracket reinforcement when the continuous steel rack pulls away from aluminum gate frames.

Identification starts with the silver FAAC data plate on the motor housing. For 400-series arms, measure the bracket center-to-center (usually 6.5″ or 8.25″) and note whether the original weld was factory MIG or a prior field repair. For underground operators, the mounting shoe bolt pattern (4-bolt vs. 6-bolt) determines whether we can use an OEM FAAC base or need to fabricate from 3/8″ plate stock.

We source FAAC OEM brackets when the part is still in production, but many 400-series weldments have been discontinued. In those cases we fabricate from A36 structural steel with ER70S-6 wire, which exceeds the original tensile spec and carries the same 365-day guarantee. We’re an independent service provider, not affiliated with FAAC.

Signs Your FAAC Welding & Fabrication Is Failing

• Visible crack at the arm-to-bracket weld. This is the most common failure we see on 400-series swing operators in Chandler. The crack propagates from the toe of the weld where heat-affected zone stress concentrates, and it’ll open fully without warning, usually during the first cold morning in December or January.
• Gate arm droops or binds mid-travel. When a hinge bracket weld cracks internally but hasn’t separated, the arm geometry shifts. The operator still runs, but the gate fights itself, and the motor draws 15-20% more current until the board faults out.
• Rattling or clanking on opening, especially from the motor side. Loose bracket bolts are often blamed, but the real cause is a fractured mounting shoe on underground 700-series units. The motor housing moves independently of the gate leaf until the crack propagates through the casting.
• Rack separation on sliding gates. The steel rack welded to an aluminum frame creates a galvanic reaction accelerated by Chandler’s irrigation runoff and monsoon humidity. The weld nuggets pop one by one until the rack bows away from the gate.
• Fresh rust streaks below any welded joint. In the Ocotillo and Fulton Ranch areas, we see this on decorative wrought iron swing gates with FAAC underground operators. The rust indicates a crack that’s opened enough to wick moisture into the gap, and the bracket is living on borrowed time.

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Replacement Cost & What’s Included

Here’s what FAAC welding and fabrication costs in Chandler, with the flat price written before any work starts:

The price includes material, mobile welding setup, post-weld cleanup, and a fresh photo record of every bead and bracket position. Under our 365-Day Done Right Promise, if a weld cracks or a bracket shifts in that window, we remake it at no charge. We don’t charge separately for the documentation; under Clause 4 of the Haven Standard, the photo log is part of every visit.

DIY or Call Us?

There’s a safe middle ground here, and then there’s the line where it gets expensive.

What you can check: tighten the bracket bolts with a socket wrench (proper torque is 45 lb-ft on most 400-series arms). Look for the crack with a flashlight while someone else cycles the gate. Measure any visible gap with a feeler gauge. If the crack is hairline and the bracket isn’t moving, you’ve caught it early.

Where DIY goes wrong: welding a loaded gate bracket without relieving the arm tension can spring the assembly when the weld puddle releases stress. We’ve been called to jobs where a homeowner’s repair held for two weeks, then failed catastrophically and bent the operator arm. The 700-series underground shoes require the gate leaf to be cribbed and the motor extracted; without the right cribbing, the gate drops on the housing. And any weld on a moving gate part in Chandler needs to account for thermal expansion across 40-degree daily swings in summer, something a 110V flux-core job in the driveway won’t handle.

If you’re unsure, call us at (520) 827-3159. We’ll look at it, name what we found, name what it costs, and name what we left behind.

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