Construction

This is the phase most people picture when they think "construction": the building actually gets built. But it isn't one continuous activity; it's a sequence of trades handing a project off to each other in a specific order, where starting something too early usually costs more than starting it late. Take a typical mid-size commercial building, picking up on the graded, staked site that Site Preparation & Mobilization already handed over. Concrete crews inspect and pour footings and foundation walls first, with rebar and formwork checked before the pour rather than after, and framing on top only starts once the concrete has gained enough strength to bear that load, not once it's fully cured, which takes far longer. Structural framing follows, steel or wood, depending on the building, giving the project its actual shape for the first time. Only once the structure is enclosed (a "dried-in" building, meaning the roof and exterior walls are up) do the interior trades start, and they go in a specific order too: HVAC ductwork first, since it needs the most space and is the least flexible, then plumbing, which needs a working slope, then electrical last, since wiring is the easiest of the three to route around whatever's already there. Insulation and a rough-in inspection follow before drywall closes the walls up. Finishes, flooring, paint, fixtures, trim, come last, because they're the easiest thing to damage if earlier trades are still moving material through the space. Running beneath that visible sequence, a second process never stops: the paperwork that keeps the sequence honest. RFIs get filed and answered when drawings don't match reality. Change orders get signed whenever the scope, price, or schedule actually changes, whether the owner asked for it or a site condition forced it. Daily reports track what actually happened on site, in case a dispute needs reconstructing later. A project manager's real job during this phase isn't swinging a hammer; it's making sure the physical sequence and the paper trail stay in sync, so nobody's building something that was never actually approved.

For a mid-size commercial building, Construction is usually the single longest phase on the calendar, typically twelve to twenty-four months, though a single-family home might see four to eight months of actual construction and a major hospital or high-rise can run past three years. What stretches it: weather delays during foundation pours and steel erection, material lead times arriving later than the schedule assumed, tight labor availability, and inspections that have to happen in sequence rather than all at once. What compresses it: prefabricating components off-site while the foundation is still curing, and a general contractor who starts early trade packages before every drawing is fully finished.

Most construction-phase problems trace back to something happening out of order, or a decision getting made without being written down. A common one: a subcontractor gets delayed by a supply shortage on a specific material, but the crew scheduled to work right after them starts on time anyway, because nobody updated the schedule. Now two trades are trying to occupy the same space, and the second crew either stands around getting paid to wait, or works around the first crew badly enough that something needs to be redone later. Weather causes a similar chain reaction on foundation pours and steel erection specifically, since concrete needs the temperature within a certain range to cure properly and steel crews can't safely work high up in heavy wind: a week of bad weather during a pour doesn't just cost that week, it pushes every trade scheduled after it. And unclear drawings cause slowdowns that are easy to underestimate: a framing crew that hits a detail the plans don't fully explain either guesses (risky) or stops and waits for an answer (slow), and an RFI that takes a week to come back can stall a whole crew for that week if there's nothing else for them to work on. None of these are unusual or rare; they're the normal texture of a construction schedule, which is exactly why tracking RFIs and change orders closely, and building some slack into a schedule for weather, matters as much as it does.