FAAC Welding & Fabrication Nationwide

FAAC Welding & Fabrication: The San Mateo Owner’s Guide

FAAC gate welding and fabrication repair in San Mateo typically runs $340-$780 for most swing and slide gate arm bracket, hinge, or mounting plate failures, and we can usually inspect and quote same-day. We stock FAAC-compatible steel and aluminum fabrication on our trucks for the 400, 402, 422, and S418 series operators, plus common hinge and post-mount hardware that fails after years of salt air from the Bay. Most San Mateo owners discover the problem when the gate arm separates from the bracket during a cycle, or when the mounting plate cracks at the weld and the motor runs but the gate doesn’t move.

Call (650) 293-9440

Which FAAC Models This Applies To

FAAC operators share a family of mounting and hinge hardware across several series, but the fabrication specs differ enough that guessing wastes a trip. The 400 and 402 hydraulic swing-gate operators use a cast-aluminum arm bracket with a specific 55 mm bolt pattern; the 422 electro-mechanical series uses a steel hinge plate with a wider 72 mm spacing. The S418 slide-gate operator mounts on a fabricated steel base plate that FAAC sizes to the operator weight class, not the gate width.

We identify the right fabrication by the metal tag riveted to the operator housing, not the remote or keypad model. The tag shows a six-digit FAAC part reference and a production date code. For brackets and hinge hardware manufactured before 2012, FAAC used a slightly different alloy mix that welds differently than current production, so we match the era, not just the model number. We carry both OEM FAAC weldment kits and aftermarket equivalents fabricated to the same tensile spec; the aftermarket saves roughly 20 percent when the part is non-structural cosmetic cover work, but we recommend OEM for any load-bearing bracket or arm mount. Vance Gate Repair San Mateo is an independent service provider, not affiliated with FAAC.

Signs Your FAAC Welding & Fabrication Is Failing

• Gate arm wobbles or droops during open/close cycles. The bracket weld has cracked at the stress point where the arm meets the operator mount. In San Mateo, we see this most often on gates facing west toward the afternoon salt breeze off the Bay; the aluminum oxidizes at the weld heat-affected zone faster than inland properties.
• Operator runs but gate doesn’t move, or moves partially then stops. The mounting plate has separated from the post or pillar. The motor thinks it’s working, the limit switches read normal, but the mechanical connection is broken. We find this on Baywood Park installations where the original fabricator used a single-bevel weld instead of a full-penetration joint on a heavy iron gate.
• Squealing or grinding from the hinge area, especially in morning cycles. The hinge pin bushing has worn oval, and the gate leaf is binding against the jamb. Left alone, the operator over-torques and eventually cracks its own mounting bracket trying to push through the resistance.
• Visible rust streaks or white aluminum oxide powder at any welded joint. This is early-stage corrosion undermining the weld. On coastal San Mateo properties within a mile of the water, we expect 6-10 year bracket life versus 12-15 years inland, and we fabricate replacement brackets with 316 stainless hardware when the original used standard zinc-plated.
• Gate sits crooked when closed, or the gap between double gates grows uneven. The lower hinge has settled or the jamb weld has cracked. The gate is slowly tearing itself away from the post, and every cycle makes the operator work harder against increasing misalignment.

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Replacement Cost & What’s Included

Most FAAC welding and fabrication repairs in San Mateo fall between $340 and $780 installed. A simple hinge pin and bushing replacement on a residential swing gate runs toward the lower end; a full arm bracket removal, field fabrication, and re-weld on a commercial slide gate pushes the upper range. The price includes the part, mobile welding setup, any necessary grinding and prep, and reassembly with the operator re-leveled and limit switches reset.

What moves the number: material type (steel versus aluminum), access (can we get the welder and ground clamp positioned, or do we need to partially dismount the operator), and whether the post or pillar itself needs reinforcement. We give you the written price before anyone strikes an arc. Under the Haven Standard, Clause 1, that flat price is what you pay. Every fabrication job carries our 365-Day Done Right Promise: if the weld or hardware fails within a year, we make it right at no charge.

DIY or Call Us?

There’s a short list of things a San Mateo homeowner can safely check. Verify the gate moves freely by hand with the operator disengaged. Look for obvious cracks or loose bolts at the bracket. Note the model number on the operator tag. That’s about where safe DIY ends.

Welding a load-bearing gate bracket involves live 240V power, heavy steel under spring tension from the gate’s own weight, and structural liability if the joint fails. We’ve been called to jobs where a handyman weld held for three weeks, then cracked at 11 PM with the gate blocking the driveway. The rework costs more because we have to cut out the bad weld and start clean. If the bracket is cracked, the hinge is binding, or the arm is separating, call (650) 293-9440. We’ll quote it in writing, fabricate to spec, and leave you a photo record of every weld and torque setting.

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