Concrete equipment pads and curbs feature cast-in-place or drilled dowels with roughened surfaces for bond, reinforced with number four bars at eighteen inches on center each way. Equipment pads utilize number three round dowels at eighteen inches on center each way with minimum three inch and maximum eight inch dimensions unassigned otherwise. Equipment curbs include two number four bars near the top and mid height, with number four dowels or round dowels at eighteen inches on center typical. Anchor bolts require sizing per equipment details, maintaining a minimum spacing of eight bolt diameters or three inches minimum for curbs and eight bolt diameters or six inches minimum for pads, whichever is greater. Concrete slabs thicken to six inches minimum typically beneath equipment curbs.
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