Capstone: an MEP coordination and procurement plan

This capstone brings the course together in one realistic task: preparing the MEP coordination and procurement plan for a small office building, as the construction manager would at the start of construction. The plan does not redesign the systems; it organizes their delivery. It confirms the codes and authorities, closes scope gaps, schedules long-lead equipment, sets up coordination, plans inspections and commissioning, checks the budget and identifies the main risks.

Work through each step for the case project below. The answers given are one reasonable approach; on a real project, your numbers would come from the drawings, the trade contracts and supplier quotations, and every assumption would be checked with the design team.

The case project

Maple Court Offices is a three-story office building of 38,750 ft² gross floor area in a mid-sized Midwestern city, with a steel frame, composite deck slabs and a curtain wall. Floor-to-floor height is 13 ft 2 in with ceilings at 9 ft. Mechanical systems are a dedicated outdoor air unit with energy recovery on the roof, air-source VRF heat pumps for zone heating and cooling, a small gas-fired condensing boiler for perimeter radiation at the entrance, domestic hot water by heat pump water heater, and a wet sprinkler system on a combined standpipe. Electrical service is 277/480 V from a utility pad-mounted transformer, with dry-type transformers to 120/208 V, LED lighting with networked controls, a 150 kW diesel generator for life safety and a small UPS for the server room. Construction is 14 months and the building must be occupied by the end of month 14.

Step 1: confirm codes, authorities and permits

The first task is a short register of governing codes and authorities, because every later step depends on it.

The register goes into the project manual and the inspection plan. Any difference between the edition used in design and the edition the authority enforces is raised with the design team immediately.

Step 2: close scope gaps with a responsibility matrix

MEP scope gaps cluster at interfaces between trades. A responsibility matrix lists each interface item and the trade that supplies, installs, wires and tests it.

The matrix is checked against each subcontract's scope and attached to it, so that gaps are fixed before buyout rather than argued about later.

Step 3: check the electrical service and cooling capacity

Before long-lead orders are placed, the construction manager does a quick reasonableness check of the main capacities against benchmarks, to catch errors and confirm what the utility must supply.

Step 4: build the long-lead procurement log

Each long-lead item is listed with its need date, lead time and submittal cycle, and the latest order date is worked back from the need date with a float allowance. Lead times below are illustrative and must be replaced with supplier quotations.

The log shows that the utility transformer and main switchboard are already critical at the start of construction, so the plan recommends pre-purchasing the switchboard and pressing the utility for a firm delivery date. It also shows that the fire pump decision depends on a hydrant flow test, which should be done in the first two weeks.

Step 5: plan coordination by area

The building has three floors and a roof. The plan sequences coordination one area at a time, ahead of rough-in, with sign-off at least 3 weeks before installation starts to allow shop drawings and prefabrication.

The ceiling space is tight: from the 2.7 m (9 ft) ceiling to the underside of the slab there is about 1.15 m (3 ft 9 in), with beams taking up to 0.5 m (20 in). The plan therefore routes the DOAS supply mains along the corridors, coordinates beam web openings with the structural engineer early, uses ceiling-cassette VRF units with short refrigerant runs, and sets clearance zones for VRF branch controllers and fire dampers so that maintenance access is protected.

Step 6: plan inspections, testing and commissioning

The plan lists every inspection and test as a schedule activity, with responsibilities and prerequisites.

• Under-slab plumbing and electrical inspections before the ground floor pour.
• Rough-in inspections floor by floor for plumbing, HVAC, sprinklers, electrical and fire alarm before ceilings close.
• Pressure tests of water, drainage, refrigerant, gas and sprinkler piping, with records.
• Permanent power energization, then equipment start-up by factory technicians.
• Testing, adjusting and balancing; controls point-to-point checkout.
• Fire alarm acceptance under NFPA 72 and sprinkler acceptance with the fire marshal.
• Functional performance testing and an integrated power failure test with generator transfer.
• Training, systems manual and closeout documents; seasonal testing and a warranty review in the first year.

Step 7: check the budget and identify risks

Finally, the plan lists the main risks, scored by likelihood and impact on a 1 to 5 scale, with an owner and a response for each.

The highest scores belong to electrical gear and the utility connection, so the plan's first actions are the utility application and the switchboard pre-purchase. The capstone deliverable is the full plan: the code register, responsibility matrix, capacity checks, procurement log, coordination calendar, inspection and commissioning schedule, budget and risk register, with assumptions clearly stated.