Bellflower Metal Gates
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Cantilever Gates

Sliding and cantilever gates for Bellflower driveways and yards, including ground-track V-track and no-ground-track cantilever designs.

Bellflower Metal Gates fabricates and installs sliding and cantilever gates in Bellflower, California, for residential driveways, commercial yards, truck and trailer access and industrial perimeters. We build both ground-track rolling gates and cantilever gates that never touch the driving surface, in steel and aluminum, and automate them with operators sized to the leaf.

A sliding gate exists to solve problems a swing gate cannot. The most common is grade: a driveway that rises from the street will bind a swinging leaf partway through its arc, because the leaf sweeps across ground that is not level. A slide gate travels horizontally and is indifferent to that slope. The second is space, since a swing needs a clear arc inside the property that many frontages simply do not have.

What a slide gate needs instead is length. The leaf has to go somewhere when the gate opens, which means clear run along the fence line, and on a cantilever it means more than the opening width because the counterbalance tail travels back too. Establishing whether that run genuinely exists, and whether it will stay clear once the property is in normal use, is the first thing we check on site. A yard that accumulates parked trailers in the run-back is a yard where the gate stops working.

Ground-Track and Cantilever Designs

Installer rolling a steel cantilever gate open across an industrial yard entrance

V-Track Rolling Gates

A V-track gate runs on grooved wheels along a steel track fixed across the opening, guided by rollers on the posts. It is the more economical sliding design and works well where the driving surface stays clean and vehicle loads are moderate. We specify guide rollers and non-pinch rollers so there is no exposed nip point at the post, and set the track into a properly prepared base, because a track laid on ground that later settles will lift and derail the gate no matter how good the leaf is.

Cantilever Slide Gates

A cantilever gate carries its entire weight on truck assemblies running inside semi-enclosed track mounted to posts on one side, leaving the opening completely clear of hardware. Nothing crosses the driving surface, so there is no rail for a loaded trailer to crush and no channel to fill with gravel. That is why cantilever is the standard specification for yards with constant heavy traffic. The counterbalance tail is what makes it work and also what constrains it, since it needs clear run-back room behind the opening.

Posts, Track and Foundations

Sliding gates put their load into the posts rather than spreading it along a fence line, and on a cantilever those posts carry the whole leaf in bending. We size post footings to the leaf weight and its overhang rather than to a standard depth, and check what the posts will actually be founded in, since made ground and old utility trenches are common on these frontages. A cantilever post that moves takes the track alignment with it and the gate never runs properly again until the footing is corrected.

Materials and Finish

Slide gates are usually longer than swing gates and therefore heavier, so material choice affects the running gear directly. Aluminum extruded from 6005-T5 and 6061-T6 alloy reduces the load on trucks, rollers and operator and will not corrode. Steel is stiffer over a long span and repair-weldable after damage. Whichever is used, steel components are prepared and coated before assembly with zinc-rich primer at welds and TGIC polyester powder over the top.

Automation and Commercial Use

Operators for Sliding Gates

Slide gate operators are rack-driven or chain-driven and are sized from leaf weight, leaf length and daily cycle count rather than opening width. We match the UL 325 class to the application, since a yard gate cycling continuously is a commercial duty even where the site is small. Rack-driven units depend on the rack staying correctly aligned to the pinion along the entire run, so we set and check that alignment across full travel rather than at the closed position alone.

Safety Devices on a Sliding Gate

A sliding gate creates different hazards from a swinging one, principally the shear point where the leaf passes a fixed post and the risk of a vehicle stopped in the opening. UL 325 requires two independent means of monitored entrapment protection, and ASTM F2200 governs the gate construction, including screening any gaps that close during travel. We fit photo eyes and edges to the monitored inputs and add exit, safety and shadow loops where traffic volume justifies them.

Yard, Loading and Industrial Applications

On commercial sites in Bellflower the sliding gate is often also a compliance item. Section 17.52.110(B) requires open areas used for parking or loading vehicles over one and a half tons to be enclosed by a solid wall or fence six feet high with solid entrance and exit gates, and solid infill adds considerable weight to a long sliding leaf. We account for that in the frame, the running gear and the operator rather than treating the infill as a finish detail applied to a standard gate.

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Good to know

Frequently Asked Questions

What is the difference between a cantilever gate and a rolling gate?

A rolling or V-track gate runs on wheels along a track fixed to the ground across the opening. A cantilever gate has no ground track at all: it hangs from truck assemblies running in semi-enclosed track on posts to one side, and the opening stays completely clear. That makes cantilever the right answer where heavy vehicles cross the threshold constantly, and rolling the more economical answer where they do not.

How much space does a cantilever gate need behind the opening?

More than people expect. Beyond the clear opening itself, a cantilever needs run-back room for the leaf plus its counterbalance tail, which is a substantial additional fraction of the gate's length. If that space is not available along the fence line, a cantilever will not fit however suitable it would otherwise be. We measure the available run before proposing one, because this is the constraint that most often rules the design out.

Why does my sliding gate keep coming off its track?

On a V-track gate it is normally worn or seized rollers, a track packed with grit, or a track that has lifted where the concrete beneath it has moved. On a cantilever it is the truck assemblies or damage to the semi-enclosed track. In both cases the gate frame is worth checking too, because a leaf that has bent along its length will keep destroying running gear whatever is fitted.

Can a sliding gate work on a sloped driveway?

Better than a swing gate can, which is often why it is chosen. A slide gate travels horizontally, so a driveway that rises from the street does not interfere with it the way it binds a swinging leaf partway through its arc. What a slide gate needs instead is a reasonably level run along the fence line for its travel, and clear space to receive the leaf.

Are sliding gates more secure than swing gates?

Generally yes against vehicle force, because a slide gate resists an impact along its length and is supported at multiple points rather than cantilevered off two hinges. That is part of why yards and industrial sites favour them. Where genuine forced-entry resistance is the requirement rather than deterrence, crash-rated anti-ram vehicle barriers are a separate class of product and we specify those on their own merits.

What maintenance does a sliding gate need?

Keeping the track clear is most of it on a V-track gate, since grit and debris are what destroy rollers. Both types need periodic inspection of the running gear, the guide rollers and the drive rack or chain, plus checking that the gate is still true along its length. Catching a worn roller early is inexpensive; running on it until the gate derails and bends the frame is not.

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