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Concrete & Masonryaka: precast concreteaka: precast panelaka: PCaka: tilt-up

Precast

In Plain English

Concrete pieces made in a factory and then shipped to the job site to be assembled — like building blocks for larger structures.

Definition

Concrete structural or architectural elements that are cast and cured at a manufacturing plant under controlled conditions before being transported and erected at the construction site. Precast elements include beams, columns, wall panels, hollow-core planks, and architectural cladding. Precasting provides consistent quality, faster field erection, and year-round production capability.

Why It Matters in Bidding

Precast moves a large share of concrete work off the critical path and into a controlled plant, which can compress field schedule and reduce on-site labor exposure—real value an estimator should weigh against higher unit and freight costs. Buyout hinges on long lead times for shop drawings and plant slots, so a late precast award can stall erection and ripple through following trades. Erection access, crane size, and delivery sequencing all carry general-conditions cost the bid must capture.

Example

On a warehouse bid, the estimator prices precast wall panels and asks the supplier for a delivery and erection sequence so the crane and erection crew can be coordinated with the slab and steel, avoiding standby time at the site.

Related Terms

Frequently Asked Questions

Precast tends to pay off on repetitive elements, tight schedules, cold-weather work, and sites with limited room for forming and curing. The savings come from faster erection and reduced field labor, which can offset higher material and trucking costs. Estimators should compare total installed cost and schedule value, not just unit price.
Precast requires time for shop drawings, engineering, owner and engineer approvals, and a production slot at the plant before any piece ships. This sequence often runs many weeks, so estimators should confirm current plant lead times during buyout and reflect the procurement duration in the schedule to protect the erection start date.
Precast is fabricated and cured at a plant, then trucked and erected on site, while cast-in-place is formed, poured, and cured in its final location. Precast offers tighter quality control and faster erection but needs crane access and freight; cast-in-place offers field flexibility for complex geometry and tie-ins.

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