Thornton Equipment Pads

Almost nobody calls us about an equipment pad on its own. The call comes attached to something else: a new air conditioner, a standby generator, a heat pump swap, a transformer the utility needs a place for, a compressor going in behind a shop. The pad is the last item on somebody's list and the first one to get decided in thirty seconds in a driveway.

That's backwards, because location is the decision with the longest tail. Get it right and nobody thinks about that concrete again. Get it wrong and you get a machine that ices up, a technician who can't reach the service side, snow sliding off a roof onto something expensive, and a pad that starts tilting because the water from the downspout above it never had anywhere else to go. We pour these across Thornton, from replacement condenser pads in Hunters Glen to generator and transformer pads on commercial sites on the north side.

Three decisions, and only one of them is about concrete

First: where. Second: how big and how high. Third: what the pad is connected to, physically and electrically. The concrete mix and the steel inside are the easy part, and they're rarely what anyone gets wrong.

Location gets driven by things that have nothing to do with the pour. Line set length. Where the electrical panel is. The service clearances in the manufacturer's manual, which the installer should hand you and which we design around. Whether snow slides off a roof valley onto that exact spot every February. Whether the yard drains toward it. How much noise the neighbors are going to hear, and whether the bedroom window is on that side of the house.

Height and size are the next argument, and they're usually settled too tight. A pad sized exactly to the machine's footprint gives nobody anywhere to stand, and gravel washes out from under the edges within a couple of seasons. A few inches of concrete beyond the frame on every side is cheap when the truck is already there.

Where the pad goes, and what each spot costs you

Vibration, conduit, and the month you pour

Rotating machinery never stops arguing with whatever it's bolted to. A condenser hums, a generator shakes hard for a few minutes during its weekly test, a compressor cycles all day. None of that breaks good concrete on a good base. What it does is find weak connections. So the details are isolation and anchorage: keep the pad separated from the house slab and the patio with a real joint, and set anchors to the equipment's bolt pattern instead of drilling near an edge later.

Conduit is where these jobs go sideways most often. Stub-ups have to come through in the right place, at the right height, in the right quantity, with sweeps rather than hard elbows, and they get set and braced before the pour instead of pushed into wet concrete. We want your electrician's layout in hand a week early. Anything coming up through concrete is a permanent decision.

On timing, late spring through fall is easy and most pads can be scheduled inside a week or two of an install date. Winter pours work with warm mix water, a non-chloride accelerator, and blankets, though we won't place on frozen ground. Equipment can usually be set well before final strength, and we'll give you the specific wait for your pad.

Clearances a pad has to respect, whatever the concrete looks like

• Service clearance on the access side, taken from the manufacturer's manual and not from what fits
• Room in front of the electrical disconnect so somebody can stand there and work
• Clear of the roof drip line, valleys, and anywhere snow reliably slides
• Above the surrounding grade, with the ground sloped away rather than toward it
• Out of the path of downspout discharge, sump discharge, and irrigation spray
• Off any walkway, so nobody is stepping around a machine in the dark
• Away from a fence or wall on the side that has to breathe or exhaust
• Isolated from the house slab, patio, or driveway with a proper joint