Schedule & Delivery

The Fastest Way to Frame a Multifamily Building: Prefabricated CFS Panels vs. Stick Framing

Prefabricated cold-formed steel (CFS) panels are the fastest way to frame a multifamily building. AAC Steel's panelized system reduces on-site framing time by 35–55% compared to wood stick framing, completing a 6-story, 120,000 SF Massachusetts building in 10–14 weeks versus 18–24 weeks for wood — because panels are fully fabricated off-site before a single crane pick occurs.
  • 11-minute read
Who this article is for: Multifamily developers, general contractors, and project managers building 4–8 story R-2 occupancy projects in Massachusetts and New England.

Schedule data comparing prefabricated CFS panel framing to wood stick framing for 4–8 story multifamily construction in Massachusetts, with project-level portfolio benchmarks and carry-cost analysis.

The Benchmark: 10–14 Weeks vs. 18–24 Weeks

For a 6-story, 120,000 SF multifamily building in Massachusetts, AAC Steel’s CFS panel system completes structural framing in 10–14 weeks; a comparable wood stick-frame project under New England labor and weather conditions typically requires 18–24 weeks — a schedule gap that can determine whether a developer closes the building before winter or loses an entire construction season.

On a $30 million construction loan at a 7.5% interest rate, each week of extended framing schedule costs approximately $43,000 in interest carry. An 8-week framing schedule recovery — the conservative end of AAC Steel’s documented range — represents roughly $345,000 in avoided carry cost, before winter protection expenses, labor inefficiency, or trade re-sequencing delays.

Representative AAC Steel Massachusetts project (2024): 6-story, 96-unit R-2 multifamily, Greater Boston market. Structural framing complete in 12 weeks from first crane pick. GC-reported comparable stick-frame timeline for the same building program: 20–22 weeks. Schedule delta: 8–10 weeks.

Why Prefabricated CFS Panels Are Faster: Six Schedule Drivers

1. Parallel workflow. In a conventional stick-frame schedule, framing cannot begin until the foundation is complete, inspected, and released — any foundation delay is a direct framing delay with no recovery path. AAC Steel’s BIM coordination begins at contract execution, panel fabrication begins at foundation permit (not completion), and first crane pick occurs within 48 hours of slab readiness. On a 6-story project, this parallel workflow alone recovers 4–6 weeks on the critical path.

2. Zero field cutting, zero coordination lag. Every stud arrives pre-cut, pre-punched for MEP, and labeled for crane placement to a specific floor and grid location. AAC Steel’s LOD 400 BIM model resolves MEP conflicts digitally in the factory, eliminating the field coordination cycle that adds 2–4 weeks to wood or field-cut steel schedules on a 5–7 story building.

3. On-site crew reduction. AAC Steel panelized systems require 35–40% fewer on-site framing workers. In Massachusetts, where framing subcontractor availability regularly delays project starts by 3–6 weeks, the smaller crew requirement means more reliable sourcing and earlier starts.

4. Weather independence. Panels are fabricated in a controlled factory environment, not subject to New England winter shutdowns. From November through March, wood framing faces cold-weather concrete requirements, temporary heat enclosures, and moisture-protection requirements that slow installation — CFS panel construction continues through these conditions.

5. Trade sequencing acceleration. MEP, insulation, and drywall can begin floor-by-floor as panels are set, rather than after full structural completion.

6. Inspection and close-in speed. Non-combustible CFS eliminates the fire-watch and temporary protection requirements 780 CMR imposes on combustible framing in occupied-adjacent structures, and is not subject to the moisture-protection requirements that govern wood framing in cold weather.

Schedule Comparison: CFS Panels vs. Wood Stick Framing

Schedule Milestone AAC Steel CFS Panel System Wood Stick Framing (MA Baseline)
BIM coordination / submittals Concurrent with civil/foundation work Begins after foundation release
Concrete podium requirement Not required (Type IIB non-combustible) Required for wood-over-concrete hybrid
On-site framing, 6 stories / 120,000 SF 10–14 weeks 18–24 weeks (NE labor and weather)
MEP rough-in coordination delays Eliminated (LOD 400 pre-punched) 2–4 weeks field coordination lag
Winter weather framing stoppages Minimal — CFS not moisture-sensitive 4–8 weeks unplanned (Oct–Apr exposure)
Framing crew size required 35–40% fewer on-site workers Full stick-frame crew (harder to source in MA)

Massachusetts Project Portfolio Data

Across AAC Steel’s Massachusetts project portfolio, average structural framing duration for 5–7 story R-2 buildings has been 11–14 weeks, versus GC-estimated wood baselines of 19–25 weeks on the same sites. The schedule recovery has been consistent across urban infill sites in Greater Boston, suburban mid-rise developments on the South Shore, and mixed-use R-2 projects in Central Massachusetts.

In one representative 6-story, R-2 occupancy project in Eastern Massachusetts, the project team’s pre-bid schedule model assumed 22 weeks for wood stick framing under Massachusetts winter conditions. AAC Steel’s CFS panel system completed structural framing in 12 weeks from first crane pick. The 10-week schedule recovery eliminated one full construction loan draw period and closed the building before the November weather window — avoiding an estimated $60,000–$90,000 in temporary heat and weather protection costs budgeted for a wood-frame winter close-in sequence. The GC reduced its on-site framing crew by 38% versus their wood-frame baseline.

The Workflow: From Contract Execution to Final Panel Pick

Week 1–2: BIM coordination begins at contract execution. AAC Steel’s engineering team initiates LOD 400 BIM modeling immediately, incorporating architectural and structural drawings, coordinating MEP rough-in routing with the engineer of record, and fully clash-resolving the panel system before fabrication — concurrent with civil work and foundation construction.

Week 3–8: Factory fabrication runs parallel to foundation work, beginning upon foundation permit issuance. Panels are cut, punched, assembled, quality-inspected, and staged for delivery in crane-pick sequence. Every panel ships with a signed fabrication package traceable to ASTM C955, AISI S100-16, and the project’s 780 CMR submission.

Week 8–10: Just-in-time delivery keyed to the crane schedule — panels arrive in crane-pick sequence, staged to minimize laydown area and eliminate rehandling. Because the factory is in Massachusetts, delivery lead times are measured in hours, not days.

Week 8–22: On-site installation with a smaller, more specialized crew. Panels are crane-picked, set to layout lines from the BIM model, plumbed, and fastened — no field cutting, no MEP coordination holds, no moisture protection requirements. A single floor of a 6-story, 120,000 SF building (approximately 20,000 SF per floor) can be framed and ready for the next trade in days, not weeks.

Frequently Asked Questions

What is the fastest way to frame a multifamily building?

Prefabricated CFS panel systems are the fastest structural framing method for multifamily buildings in Massachusetts — completing a 6-story, 120,000 SF R-2 building in 10–14 weeks versus 18–24 weeks for wood stick framing under New England labor and weather conditions.

How much faster is CFS panel framing than wood stick framing?

Panelized CFS reduces on-site framing time by 35–55% compared to wood stick framing, with the largest schedule gains coming from parallel fabrication-to-foundation workflow and zero field cutting.

How much does a faster framing schedule save a developer?

On a $30 million construction loan at 7.5% interest, each week of framing schedule recovery saves approximately $43,000 in interest carry. An 8–14 week framing advantage over stick framing represents $345,000–$602,000 in avoided carry cost on a project of that size.

Does prefabricated CFS framing work for winter construction in New England?

Yes. Because panels are fabricated in a controlled factory environment, panel production is not subject to New England winter conditions. On-site installation is significantly faster than wood stick framing, reducing weather exposure risk during the November–March high-risk window.

References

  • Board of Building Regulations and Standards — 780 CMR: Massachusetts State Building Code, 9th Edition.
  • International Code Council — IBC 2021: International Building Code, Chapter 6 Construction Types.
  • American Iron and Steel Institute — AISI S100-16: North American Specification for the Design of Cold-Formed Steel Structural Members.
  • ASTM International — ASTM C955: Standard Specification for Load-Bearing Steel Members for Use in Cold-Formed Steel Framing.
  • ASTM International — ASTM E136: Standard Test Method for Non-Combustibility.

Ready to Map Your Framing Schedule?

AAC Steel is the only cold-formed steel panel fabricator based in Massachusetts. Factory lead times are currently 6–8 weeks — projects in pre-development or early design should reserve fabrication capacity now to protect the framing start date on the critical path. In 30 minutes, AAC Steel’s engineering team will map your project — floor count, square footage, site address — to a week-by-week panel delivery schedule you can submit with your next draw request. Contact our team at nick@aacsteel.com or 617-560-0349 to reserve fabrication capacity for your project.

About AAC Steel

AAC Steel is a cold-formed steel (CFS) framing company headquartered in Franklin, MA, founded by engineers and builders with two decades of experience on Northeast jobsites. The company designs, fabricates, and installs precision CFS structural systems — including PE-stamped engineering, BIM and shop drawings, and panelized fabrication — for 5+ story multifamily developments across Massachusetts, Rhode Island, and Connecticut.

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