How a Production Moulding Run Gets Bundled, Crated and Delivered Intact

What Intact Means on a Production Run

A moulding run arrives intact when the last piece pulled out of the last bundle still matches the first piece off the moulder in profile, color, moisture content and surface condition. Damage on a large run is rarely dramatic. Nobody calls about a crate that slid off a forklift. The calls come about a crushed bead on the top piece of every bundle, a stain line where a wet strap sat against Sapele for four days, or eighty pieces that cupped in an unconditioned garage before anyone opened the wrap.

Those failures start at the packaging bench, not on the highway. A run of several thousand identical pieces is not a shipment of lumber. It is a sequence of units that has to stay sorted, stay dry and stay off its own moulded faces through loading, transit, unloading, storage and a second handling when the installer stages material room by room.

ICD, the architectural millwork division of J. Gibson McIlvain, builds true custom work planned around a specific space, and on a production run the packaging plan gets drawn at the same time as the profile. Bundle counts, tag language and crate type are settled before the knife is ground, because those decisions change how pieces come off the moulder and how they are stacked at the outfeed. The working process treats the crate as part of the order, not as an afterthought at the shipping door.

Moisture Control Before the Crate Closes

Packaging protects a moisture content that was already set in the kiln and the shop, and no wrapper rescues material that was crated wet or stored badly on arrival. Interior millwork leaves the shop near 6 to 8 percent in-service moisture content. Exterior work runs near 12 to 16 percent. Those targets belong to the building the material is going into, and the equilibrium behavior behind them is laid out in the Forest Products Laboratory Wood Handbook.

A sealed poly bag looks protective and behaves badly. Warm shop air trapped against wood that cools inside a trailer overnight puts liquid water on the surface of the bundle, and on a primed face that water goes straight to blistering. Breathable wrap, vented poly, or paper with an outer stretch layer at the ends lets the unit equalize without standing in its own condensate.

J. Gibson McIlvain mills the run to the in-service target for the space it is going into and wraps it so that target survives the trip. Nothing about a crate makes wood stop responding to relative humidity. The crate only buys time, and the amount of time it buys is the number an installer needs to know.

The receiving environment does the rest of the work. A conditioned interior space at ordinary occupied humidity holds an interior run steady. A slab-on-grade garage in July does not, and the moisture physics of that difference are covered plainly in Building Science Corporation's material on moisture and materials.

Bundling a Run So One Piece Can Be Found

Thousands of identical pieces have to leave the shop as a countable set of tagged units, not as a pile that has to be torn apart to locate one profile. A unit is a bundle sized to a number a crew can count at the dock and a weight two people or one forklift can move without dragging. Overstuffed bundles get cut open on the ground and the loose pieces get walked on.

Tagging carries the load here. Each unit gets the profile number, the run number, the piece count, the length mix and the phase or building it belongs to, written the same way on the tag, the packing list and the shop record. Millwork nomenclature and standard profile designations from the Wood Moulding and Millwork Producers Association give that language a common footing, and the grade and character expectations for the rough stock behind it sit in the National Hardwood Lumber Association rules.

ICD records the knife number, the run number and the unit breakdown together, so a call about unit 14 of 32 does not turn into a hunt. Architectural woodwork quality documentation from the Architectural Woodwork Institute follows the same logic, which is that the paperwork traveling with the material is part of the product.

Length segregation matters more than most buyers expect. Mixing 16 ft pieces and 6 ft pieces in one bundle guarantees the short stock walks first and the long stock gets handled repeatedly to get at it. Separate the lengths and the run stays orderly through the third handling.

Protecting the Profile Where It Is Weakest

The parts of a moulding that get damaged are the arrises, the quirks and the fillets, which is exactly the detail the knife was ground to produce. A crown with a crisp fillet and a tight quirk has edges measured in fractions of a sixteenth. One strap pulled over a bare bundle corner flattens that edge on every piece in the top course.

The fixes are unglamorous and they work. Nest pieces face to face so moulded surfaces meet moulded surfaces of the same shape rather than bearing on a flat back. Cap the bundle with a sacrificial board. Run corner board or a wooden caul under every strap so the strap tension lands on the caul instead of the profile. Keep banding off finished beads entirely.

Species hardness changes how much padding a bundle needs. Sapele at roughly 1,410 lbf and Hard Maple at roughly 1,450 lbf take a knock that would print permanently in Genuine Mahogany at roughly 800 lbf or Cherry at roughly 950 lbf. The published properties for Sapele tell part of the story, and the rest is shop experience about which faces dent when a bundle lands hard on a dock plate.

Cedar deserves its own note because it packs differently. It is a legitimate default for exterior trim and it is soft, so bundles want more slip sheeting and lighter strap tension. Clear vertical grain, CVG, and select tight knot, STK, also behave differently under a strap, since a strap crossing a knot in STK stock concentrates load in one spot instead of spreading it.

Primed Faces Change the Packing Rules

Primed trim cannot be packed the way bare trim is packed, because a coating that has not finished curing will block, print and lift when it is stacked and strapped. J. Gibson McIlvain primes in three levels, in oil-based and water-based systems, with a fungicide additive on exterior primed trim. Each of those systems has its own cure window, and the packaging step waits for it.

Open-grained and oily species absorb a great deal of finish, so a primer coat evens out the eventual painted surface. Sanding or buffing after priming knocks back grain raising while keeping the moulded detail crisp. That buffed surface is also the surface a strap will mark, so primed units get slip sheets between courses and padded cauls under every band.

For painted exterior trim, Sapele is the better call than Genuine Mahogany. It holds paint better, it comes in a wider range of sizes and longer lengths, and on a production run those longer lengths mean fewer joints for the painter to chase. Sapele is not milled 1x8 for exterior use, since that width is too wide to stay stable. Cupping in service is driven by installation and back ventilation, not by the species on the tag.

Primed material also wants to ship face up and flat rather than on edge. A primed profile stood on edge in a truck for 2,000 miles takes its bearing on one arris for the whole trip.

Bundles, Skids and Crates Compared

There is no single right package for a production run, and the correct choice depends on how many times the unit will be handled between the mill and the wall. A dedicated truck with two stops is a different problem than a common carrier shipment that gets cross-docked three times. The packaging line reads the freight plan first and the profile second.

Long Lengths, Radius Parts and Odd Sections

Long stock and curved stock fail in transit for the same reason, which is support in the wrong places. A 16 ft casing carried on two bearers 10 ft apart takes a set. Add a strap over the middle and the set becomes permanent. Full-length dunnage under the unit, bearers at 4 ft intervals or closer, and no strap tension between bearers keeps long lengths straight.

Radius work is the harder case. A curved crown or a segmented arch top has no flat face to rest on, so ICD builds cradles cut to the actual curve and ships curved members nested in those cradles rather than lying on a flat deck. The cradles stay with the material through site storage, which is why they are built to be kept rather than thrown away with the crate lid. The range of shapes this applies to shows up across the trim profile work the division produces.

Modified woods carry a hard length ceiling that shapes the packaging plan before anything else. Thermory and Abodo Vulcan, both carried, along with Accoya, top out around 16 ft, and most of that material sells on metric lengths just under 16 ft because of kiln size. Plan crate lengths around that reality rather than around a drawing that assumes 20 ft stock.

Width has its own limit in modified material. Thermally modified Ash is not available wider than 8 inches, so a wide board in a modified product means Accoya or Abodo Vulcan. Accoya runs roughly 1,600 lbf with acetylation giving dramatically reduced shrinkage and swelling, which makes it more forgiving of a long transit in a hot trailer than unmodified stock. Modified products are also the only ones carrying a warranty. It is not possible to warranty solid unmodified wood, an organic material responding to its environment, and the published information on thermally modified timber is worth reading alongside the Accoya data before a species gets locked.

The millwork palette for machined and glued components stays with Sapele, Iroko, Afrormosia, Teak and Utile. Those species mill cleanly, glue reliably and hold a crisp profile. Tropical decking species such as Ipe, botanical name Tabebuia spp, along with Cumaru, Garapa, Jatoba and Red Balau, are extremely hard and carry high oil content, which makes them difficult to glue, so they belong on a deck rather than in a moulding run.

Loading, Blocking and the Trailer Environment

Most transit damage on a moulding run happens in the first and last 50 ft of the trip, at the dock, not on the interstate. A unit blocked against the trailer wall, chocked front and back and strapped over cauls does not shift. A unit sitting loose in the nose of a trailer walks forward on every stop and arrives with broomed ends.

J. Gibson McIlvain runs its own fleet of trucks and keeps a section of the mill dedicated to packaging, which is what makes the loading pattern a deliberate choice rather than whatever fits. Units get loaded in the reverse order of the unload, so the first bundle the crew needs is the first one off the truck. Heavy skids go on the deck, light bundles go on top, and nothing moulded carries another unit's weight.

Deliveries run nationwide, regularly to California, and a cross-country run gets packaged differently than a run going 90 minutes up the road. Longer transits mean crates instead of bundles, more slip sheeting, and venting decisions made deliberately rather than by habit.

Weather exposure at delivery is the variable nobody controls. Wrap that sheds a passing rain is worth having even on a run going into a dry building, since material frequently sits on a loading dock longer than anyone planned.

Receiving a Run the Shop Does Not Install

J. Gibson McIlvain supplies and mills, and the installer owns everything that happens after the truck gate opens, so the packaging has to be built for someone else's hands. That means legible tags, an accurate packing list, and units that can be counted without unwrapping everything.

The receiving routine is short. Count units against the packing list before signing. Note visible crate damage on the delivery receipt at the dock rather than three days later. Open one unit, check the profile against the approved sample, and confirm the moisture reading before the rest of the run gets broken down.

Storage on site decides the next two weeks. Stack flat, on level bearers, off the slab, in conditioned space for interior work. Do not lean long casing against a wall. Do not stand primed material on edge. Keep the wrap on units that are not in use yet and pull only what the crew will install that week.

Where a CITES-listed species is in the run, documentation and chain of custody travel with the material, so that paperwork stays with the shipment rather than getting filed separately at an office.

Overruns, Reorders and Storage Between Phases

A production run should ship with an overrun, and the shop should be able to reproduce the profile exactly when the overrun runs out. Site damage happens. A piece gets cut short, a bundle gets rained on, a subcontractor puts a scaffold leg through a crate. The question is whether the replacement piece matches or announces itself.

J. Gibson McIlvain holds a profile library of thousands of ground knives and grinds new knives every week, so a run milled in March can be matched in November off the same knife and the same setup. If a profile is not in the library it gets ground to match, including difficult historical restoration profiles and contemporary shapes.

Storage of finished millwork is part of the service, which matters on phased work. The shop mills the whole run at once from matched stock, then holds the balance under inventory control and releases it when a floor is ready. That beats milling phase two nine months later out of a different lot.

"I would rather send a job out as fourteen tagged units than as one big crate the installer has to tear apart to find the door casing. We hold the balance of a run in our own storage and release it when the site is actually ready for it, and the last pieces look exactly like the first ones."

Norm Moton, Director of Sales, J. Gibson McIlvain

How J. Gibson McIlvain Would Specify This

Write the packaging into the millwork specification with the same precision used on the profile, because a run that arrives damaged costs more schedule than it ever cost in material. Name the unit size, the tag content, the wrap type, the crate type by leg of the trip, and the overrun held back in storage.

For a painted exterior run, that reads as Sapele milled to 12 to 16 percent, primed to the specified level with the fungicide additive on exterior work, buffed after priming, packed face to face with slip sheets between courses and padded cauls under every band, in cleated crates for any leg moving by common carrier. For an interior stain-grade run in Utile or Afrormosia, it reads as 6 to 8 percent, bare, breathable wrap, sacrificial cap boards, bundles sized to a count the crew can verify at the dock.

Radius members ship in cradles cut to the curve. Long lengths ship on full-length dunnage with bearers at 4 ft or closer. Modified material gets drawn around a ceiling near 16 ft rather than against it. The knife, the run number and the unit breakdown stay on file so phase two matches phase one.

The linear trimwork, finished cladding and primed trim side of this work runs through the J. Gibson McIlvain millwork service, while true custom components planned around a specific space, radius millwork, custom doors, box beams and cabinetry, come from ICD, the architectural millwork division. Both sit behind one order and one delivery. To lay out a production run, set the packaging plan, or get a profile matched from the knife library, call 800-638-9100 and talk through the freight legs before the drawing is final.

Frequently Asked Questions

How many pieces should go in one bundle on a large moulding run?

Size the bundle to a count a receiving crew can verify at the dock and a weight that moves without dragging, and keep one profile and one length group per unit. On a run of several thousand pieces that means many modest tagged units rather than a few large ones. Oversized bundles get cut open on the ground, the count gets lost, and loose pieces get walked on. Every unit should carry the profile number, run number, piece count, length mix and the phase or building it belongs to, matching the packing list word for word.

Does shrink wrap protect moulding in transit?

It protects against abrasion and dust, and it works against you if it seals. Warm shop air sealed against wood that cools overnight in a trailer condenses on the bundle, and on a primed face that water causes blistering. Breathable wrap or vented poly with an outer stretch layer at the ends gives abrasion protection without trapping moisture. Wrap is also not structural, so it does nothing about strap marking or crushed arrises. Those need sacrificial cap boards and wooden cauls under every band.

Can a production run ship already primed, or should priming wait until the material is on site?

It can ship primed, and on most painted exterior work that is the better sequence. J. Gibson McIlvain primes in three levels in oil-based and water-based systems, with a fungicide additive on exterior primed trim, then sands or buffs to knock back grain raising while keeping the moulded detail crisp. The packaging step waits for the cure window of that specific coating system, and primed units then ship slip-sheeted between courses with padded cauls under the bands. Packing a coating before it has cured is what causes blocking and print-through.

What packaging do radius mouldings need that straight stock does not?

Cradles cut to the actual curve. A curved crown or segmented arch top has no flat bearing face, so laying it on a flat deck point-loads it and invites racking and flexing. ICD builds cradles to the specific radius, nests the members in them, and sends the cradles along so the installer can keep curved parts supported through site storage rather than discarding the support with the crate lid.

How should the installer store a moulding run after it is delivered?

Flat, on level bearers, off the slab, in conditioned space for interior work milled to 6 to 8 percent. Leave the wrap on units that are not in use and pull only what will be installed that week. Do not lean long casing against a wall and do not stand primed material on edge, since both put the weight of the whole piece on one arris. An unconditioned garage will move interior millwork faster than any transit ever did.

Can part of a run be held back and shipped later for a second phase?

Yes, and on phased work that is usually the right call. Storage of finished millwork under inventory control means the full run gets milled at once from matched stock and released as floors become ready. The knife, the run number and the unit breakdown stay on file, so replacement or overrun pieces come off the same setup rather than a new grind months later. Deliveries go out nationwide, regularly to California, on the company's own fleet of trucks.

Does J. Gibson McIlvain handle installation of the run it packages?

No. J. Gibson McIlvain supplies and mills, and the installation belongs to the buyer's own carpenter or installation contractor. The packaging is built around that fact, which is why tags, packing lists and unit sizes are written for someone else's crew to read at the dock. Field measurement and installation coordination stay with the installer as well. The shop's part is delivering material that matches the approved profile at the specified moisture content, in units that can be counted and staged without damage.

What is the right way to document damage found at delivery?

Note it on the delivery receipt before signing, photograph the crate or bundle before opening it further, and record the unit tag number so the piece can be traced back to its run. Damage reported at the dock is straightforward. Damage reported after the wrap has been off for a week is nearly impossible to attribute between transit, unloading and site storage. Keeping one unit sealed as a reference also helps when a question comes up about profile or color later in the job.

Sources and Standards Referenced

• Wood Handbook: Wood as an Engineering Material, USDA Forest Products Laboratory
• BSD-138: Moisture and Materials, Building Science Corporation
• Wood Moulding and Millwork Producers Association
• National Hardwood Lumber Association Rules and Grading
• Architectural Woodwork Institute Quality Standards
• Sapele, The Wood Database
• Accoya Acetylated Modified Wood
• Thermory Thermally Modified Timber