Aurora Equipment Pads

Not every piece of equipment needs a poured pad, and we'll say so before we take the job. A light condenser on stable ground can live on a composite pad for years. A standby generator with a gas line, a transfer switch, and a service tech who has to kneel beside it twice a year is a different animal. So the useful question isn't what a pad costs. It's which of the available answers actually matches the machine, the load, and the ground it's sitting on.

We pour these all over Aurora, residential units tucked along side yards in Sterling Hills and Tollgate Crossing, and light commercial pads for generators, chillers, and compressors. The equipment changes. The decision framework doesn't.

Four ways to support equipment, and when each is the right call

Vibration, and everything that has to come up through the concrete

Equipment that runs shakes, and shaking is not what concrete enjoys. A compressor, a generator under load, or a large condenser pushes energy into whatever it's bolted to, and a thin unreinforced pad answers with cracks radiating from the anchor points. Mass helps. So does steel: bar on chairs rather than mesh flopping in the bottom, with thickness matched to the machine instead of to a default. Isolation mounts handle the rest, and where a pad sits close to the house we keep it separate from the foundation so movement isn't shared.

The other half is what passes through the slab. Electrical conduit, gas penetrations, condensate and drain lines, control wiring, grounding. All cheap to sleeve before the pour and genuinely painful afterward. Coring a finished pad beside a live gas line is nobody's favorite afternoon.

So we want the equipment submittal and the installer's rough-in locations before ordering concrete. Stub-ups land where the cabinet knockouts are, not where they seem reasonable, and anchor patterns come off the manufacturer's drawing. A few emails with your electrician beats watching a tech improvise a conduit bend around a stub that missed by four inches.

What we want in hand before we order concrete

• The equipment cut sheet, with operating weight and the required pad footprint
• Anchor bolt pattern and any clearance the manufacturer specifies around the unit
• Conduit and gas penetration locations from whoever is doing the rough-in
• The delivery and install date, so cure time isn't discovered the morning of
• Service clearance confirmed, since a technician needs room to stand and open a panel
• Drainage checked at the location, because a pad in a low spot collects everything the roof sheds
• Utility locates placed, especially where a pad lands near the meter or the service entrance

Pouring against an install date, and living with it through a Front Range winter

Almost every pad we pour is racing something: a generator delivery, an HVAC changeout in the first hot week, a compressor arriving with the installer already booked. Concrete is unimpressed by all of it. It needs a few days before a heavy machine lands on it and longer before it has real strength. We work backward from your install date and pour early rather than fast.

Season shapes the plan more than the product. April through October is straightforward. Winter pads get heated water, chloride-free accelerator, and blankets, and we won't place on frozen ground, because that ground pulls back as it thaws and leaves the pad unsupported exactly where you can't see it. For a January install, a temporary enclosure with heat is often the cheaper answer.

Once it's in, the care list is short. Keep deicing chemicals off entirely the first winter and go easy after that, since magnesium chloride is hard on any exterior concrete. Shovel around it instead of chipping ice against the edge. Keep roof runoff from dumping beside it, because water undermining the base is what actually tilts these pads.

Nine times out of ten a tilted AC pad isn't a concrete failure. Somebody's downspout has been washing the base out from under one corner since the house was new.What our crew lead tells homeowners