Roof trusses carry the weight of the roof and transfer it to the walls, and most residential and light commercial roofs in North America use them. Truss plants fabricate these engineered frames in a controlled shop, then deliver them to the site ready to set. The industry behind them keeps consolidating, and the strategic expansion in compact construction equipment that reshaped that niche shows how manufacturers buy their way into new product lines. Truss buyers see the same logic when a plant changes hands: the facility, the crew, and the customer relationships usually stay in place.
Understanding how trusses are designed, built, and delivered helps contractors order the right frames, schedule the set, and inspect what arrives. This article covers the common truss types on residential plans, the five-stage manufacturing process, jobsite safety for handling and setting trusses, the air tools crews run, and the checks to make before a truss order goes to the plant.
Why Truss Plants Expand Through Acquisition
Opening a new plant takes years: site selection, equipment installation, hiring, and a long ramp-up before output meets quality targets. Buying an operating plant skips most of that. The buyer keeps the experienced crew, the customer list, and the manufacturing know-how, which is why acquirers describe the deal as building on a strong foundation rather than starting from scratch. The same strategic growth in pavement maintenance that consolidated that service niche shows how acquisition scales businesses that depend on local relationships. In a typical transaction, the seller stays on briefly to hand over vendor accounts and production habits, then the new owner standardizes equipment and software.
Employee ownership and retention
Some building suppliers operate as employee-owned companies, and when they acquire a plant, the existing workers often join the ownership structure. Retention matters because truss assembly is skilled work: a crew that has run the same jigs for years produces more consistent joints than a newly hired team. Plants that lose half their crew in a transition also lose the tacit knowledge of which lumber batches move smoothly through the presses.
Capacity and regional reach
A truss plant typically serves a 100 to 200 mile radius, because long hauls waste fuel on bulky, low-density loads. Acquiring a plant in a new region gives a supplier instant capacity in that market, the same reason distributors add locations rather than enlarge one yard indefinitely. For contractors, the practical effect is a second source within driving distance, which shortens lead times when the local plant is booked.
Common Roof Truss Types and When to Use Them
Truss geometry follows the loads. Span, roof pitch, and the shape of the living space below decide which configuration fits. The table below compares the types builders specify most often.
| Truss type | Typical span | Best use | Notes |
|---|---|---|---|
| King post | Up to 16 ft | Small roofs and sheds | Single center post, simple to build |
| Queen post | 16 to 24 ft | Wider simple spans | Two posts, more headroom at center |
| Fink (W) | 20 to 40 ft | Residential roofs | Most economical for common spans |
| Howe | 30 to 60 ft | Heavy loads | Diagonal webs in tension |
| Pratt | 30 to 60 ft | Long clear spans | Vertical webs in compression |
| Scissor | Varies | Vaulted ceilings | Raises the ceiling line inside the roof |
| Parallel chord | 20 to 60 ft | Flat and low-slope roofs | Also used as floor trusses |
Fink trusses dominate residential work because the W-shaped web uses the least material for typical spans. Scissor trusses create cathedral ceilings without a ridge beam, and parallel chord trusses double as floor joists on long spans. After the roof is sheathed, locating the framing members underneath takes a reliable detector, and a detailed stud finder review explains how these tools work and where they fall short on deep assemblies.
Span, pitch, and spacing
Trusses are spaced 16 or 24 inches on center in most houses. Doubling the spacing from 16 to 24 inches cuts the number of trusses by a third, which lowers material cost but requires heavier chords to carry the wider load. Engineered trusses often cost less than site-built rafters because the plant buys lumber in bulk and wastes little; material savings run 10 to 30 percent on typical roofs, and installation is faster because the geometry is fixed at the factory.
Load paths and bearing
Every truss transfers load to the walls at defined bearing points. Bearing width, typically 1.5 to 3.5 inches on a framed wall, must match the truss design, and the bottom chord needs a solid connection to the top plate, usually with metal connectors rated for uplift in wind zones. Trusses must also sit plumb; a leaning truss shifts the load path and can crack plates at the heel.
Inside a Truss Plant: From Design to Delivery
Truss manufacturing is a five-stage process, and each stage has quality checks. The equipment involved is specialized, and the same flooring equipment consolidation that merged diamond tool makers has parallels in truss machinery, where plants standardize on fewer, larger production lines to hold tolerances across shifts.
- Design and engineering: software sizes every member and connector plate from the project loads and geometry.
- Cutting: automated saws cut chords and webs to length and angle, with errors checked against the cut list.
- Assembly: workers lay members on jig tables at the exact geometry, using stops and templates.
- Pressing: hydraulic or roller presses embed gang-nail plates into both faces of every joint.
- Inspection and delivery: plant QC checks plate placement and dimensions, then trusses are banded and trucked.
Gang-nail plates
Most wood trusses are joined with steel gang-nail plates, punched metal plates pressed into the wood on both faces. Plate size and tooth pattern are engineered, not guessed; a plate that is too small pulls out under load, and one that is oversized splits the lumber. Look for full plate seating on both faces, with no daylight between plate and wood.
Design software and cut lists
Truss design software calculates member forces, generates cut lists, and prints layout drawings for the crew. The same software produces the bracing plan the installer follows on site, so the plant and the crew work from a single source of truth. When a plan revision arrives, the plant re-runs the design before any steel is cut.
Safety and Handling on the Jobsite
Trusses arrive stacked and banded, and the riskiest part of the job is moving them from the truck to the roof. Handling heavy trusses demands the same attention to workwear and construction safety that protects workers in cold-chain and other demanding environments, where protective gear is part of the daily routine.
Lifting and rigging
Long-span trusses flex under their own weight, so rigging points follow the manufacturer lifting diagram, usually at panel points. Crews use spreader bars to keep slings vertical and avoid bending the truss during the pick. A 40-foot truss can weigh 200 to 400 pounds depending on species and chord size, heavy enough to injure a crew that tries to muscle it by hand.
Temporary bracing
Until sheathing goes on, trusses rely on temporary bracing. Permanent bracing is installed after the roof deck is fastened, and temporary bracing is removed only then. Falling trusses are a leading cause of framing injuries, so the bracing plan from the design software is not optional; crews that skip it risk a domino collapse across the whole roof.
Fall protection and PPE
- Hard hat with chin strap
- Full-body harness and lanyard tied off to a secured anchor
- Cut-resistant gloves rated for lumber handling
- Non-slip boots for walking the top chord
Setting trusses happens at height on a narrow walking surface, and the gear above is the minimum kit. On steep pitches, installers work from lifts or use safety lines before any sheathing provides footing.
On-Site Tools and Compressed Air
Framing crews carry nailers, compressors, and saws to the site. Pneumatic nailers and staplers run on compressed air, and the supply system has to be sized for the number of tools firing at once.
Sizing the compressor
A framing nailer uses roughly 2 to 3 cubic feet per minute at 90 to 120 psi. Two nailers firing continuously need a compressor delivering at least 6 cfm; a 10 cfm unit covers three or four tools. Undersized compressors cycle constantly and starve tools at the worst moment, so check the cfm rating at the pressure you actually run, not the peak number on the tank sticker.
Hoses and fittings
Long hose runs drop pressure. A 100-foot run of 3/8-inch hose can cost several psi, and 1/2-inch hose holds pressure better for long reaches. Quick couplers leak when worn, so replace damaged fittings before they sap tool performance on the last truss of the day.
Buying Trusses: What to Check Before You Order
The paperwork matters as much as the wood. A truss order includes engineered drawings, a layout plan, and the manufacturer approval stamp. Confirm that the design matches the plans before fabrication starts, because changes after cutting are expensive.
Design review and site conditions
The truss designer needs the same information the structural engineer used: snow load, wind speed, roof pitch, and the exact wall layout. Wrong inputs produce trusses that pass shop QC but fail on the roof. Review the shop drawings against the architectural plans, and flag any conflict before the plant cuts steel.
Delivery, storage, and handling
Schedule delivery for the day of the set, or store bundles on blocking so they stay out of mud. Bands stay on until the truss is lifted, and damaged members are rejected and returned, not field-repaired. A truss with a cracked chord or a pulled plate is a structural problem, not a cosmetic one.
Modern layout, member sizing, and cut lists all happen in construction software that has changed how trusses are engineered and documented. Buyers who review the digital package alongside the physical lumber get the full picture before a single truss is set, and that review is the cheapest insurance on the whole job.