Market Intelligence
Commercial door manufacturers: overhead and dock door demand
Size warehouse door stock and replacement demand, separate whole-door work from component service, and connect verified openings to dealer capacity.
Direct answer
Commercial door manufacturers find overhead and dock door demand by counting freight openings, verifying installed assemblies and matching replacement work to capable dealers. Anvilfield estimates 62,000 annual whole-door replacements in the selected 2018 US warehouse reference stock, with a range of 23,000 to 119,000. Separate dock-height doors from grade-level doors, then connect each opening to its service history, operating duty and purchasing responsibility.
On this page
Where is commercial door demand concentrated?What exactly belongs in the door installed base?What does Anvilfield estimate for warehouse door demand?How do you find doors and verify the opening count?What starts a whole-door replacement conversation?Anvilfield which duty and renewal benchmarks are useful?How do leading manufacturers assign dealer coverage?Worked example: a regional door manufacturer with four dealersHow should a distributor turn the register into an order plan?What should asset monitoring change in a door territory?Common mistakesTerritory release checklistMethodologyOpen the related tool for the calculation, checklist, or packet.
FieldOS by AnvilfieldOffline-first FieldOS for job photos, proof packets, property memory, calculations, teams, billing, and owner-ready reports.Key takeaways
- Anvilfield estimates 1,241,000 freight door assemblies and 62,000 annual whole-door replacements in the selected warehouse reference stock.
- Keep dock-height doors, grade-level doors, operators and dock equipment in distinct asset records.
- Use spring cycle ratings to compare component duty, and use assembly condition and history to qualify whole-door replacements.
- A 1,000-building territory at the reference mix produces 234 annual replacements before coverage and win-rate filters.
Where is commercial door demand concentrated?
Commercial door manufacturers find overhead and dock door demand by counting freight openings, verifying installed assemblies and matching replacement work to capable dealers. Anvilfield estimates 62,000 annual whole-door replacements in the selected 2018 US warehouse reference stock, with a range of 23,000 to 119,000. Separate dock-height doors from grade-level doors, then connect each opening to its service history, operating duty and purchasing responsibility.
The useful starting point is a warehouse building and its freight openings. A distribution operator needs receiving and shipping access; a storage operator needs secure access to stock; a refrigerated operator needs a closure suited to its temperature boundary. Each use gives the manufacturer a different qualification question. Record the opening and operating requirement before selecting a replacement family.
Targeted market intelligence means sizing and locating demand at the building level rather than allocating it from ZIP code population. For commercial doors, connect the building, exterior opening, current door assembly and dealer service area. This register turns a broad commercial market into an account file that a representative can inspect, discuss and develop.
The warehouse model below covers distribution centers, nonrefrigerated warehouses and refrigerated warehouses above the stated size threshold. Manufacturers should keep additional registers for vehicle service buildings, fire stations, retail receiving areas and production plants. Those applications deserve their own opening counts and duty records. Keep replacement assemblies, new openings, component repairs and inspection agreements in separate commercial reports.
What is targeted market intelligence for building products and servicesFind warehouse loading-dock maintenance customersWhat exactly belongs in the door installed base?
A freight opening is a location in the building envelope. The door assembly installed at that location is a replaceable asset. Keep the location identifier stable when a dealer replaces the door, changes its operator or repairs its panels. This preserves the maintenance history without treating the replacement as another opening.
Classify exterior freight doors by dock-height or grade-level position, then record sectional or rolling construction separately. A dock door describes where the closure serves the loading operation; it does not identify its construction. Record high-speed interior traffic doors, personnel doors and public self-storage unit doors in their own product groups.
A leveler, restraint, seal, shelter and door operator have separate identities beneath the dock position. Their service needs create related opportunities, but replacing a leveler does not create a door order. A dealer reviewing a complete bay should return a component-specific scope so the manufacturer can forecast the products actually needed.
Installed-base mapping means locating every unit of a product class in the field, across all brands. Include competing door assemblies and preserve unknown brands until a label, drawing or service record establishes the manufacturer. A distributor needs the actual assembly identity to assess parts compatibility and replacement options.
Record door width and height, lift arrangement, available headroom, track or guide configuration, operator identity and current documentation. Retain the evidence behind each value. The dimensional survey and approved submittal become the basis for an order; the opening register organizes where that work should happen.
Installed-base mapping for equipment manufacturersLoading dock equipment manufacturers: dock count and replacement cyclesCommercial overhead door and dock leveler installationMapping an installed base without guessing equipment brandsWhat does Anvilfield estimate for warehouse door demand?
Anvilfield estimates 265,000 included US freight warehouse buildings above 10,000 square feet in the 2018 reference stock. This building frame stays fixed across the demand cases.
Anvilfield estimates 908,000 installed dock-height door assemblies, with a range of 521,000 to 1,295,000, and 332,000 grade-level overhead door assemblies, with a range of 172,000 to 493,000. Anvilfield estimates total exterior freight-door stock at 1,241,000 assemblies, with a range of 693,000 to 1,788,000.
Anvilfield estimates 45,000 annual dock-height door replacements, with a range of 17,000 to 86,000, and 17,000 annual grade-level replacements, with a range of 6,000 to 33,000. Anvilfield estimates 62,000 combined annual whole-door replacements, with a range of 23,000 to 119,000.
Anvilfield estimates 4.7 freight doors per included warehouse, with a range of 2.6 to 6.7, and 234 annual replacements per 1,000 included buildings, with a range of 87 to 450. Anvilfield estimates annual whole-door turnover at 5.0%, with a range of 3.3% to 6.7%.
Keep the building frame, installed assemblies and annual replacement flow attached to their stated units. A spring, panel or operator repair stays outside the whole-door total. Methodology records the size bands, opening densities and assembly cycles.
| Anvilfield estimate | Low | Central | High |
|---|---|---|---|
| Included warehouse buildings | 265,000 | 265,000 | 265,000 |
| Installed dock-height door assemblies | 521,000 | 908,000 | 1,295,000 |
| Installed grade-level overhead door assemblies | 172,000 | 332,000 | 493,000 |
| Installed freight door assemblies, total | 693,000 | 1,241,000 | 1,788,000 |
| Annual dock-height door replacements | 17,000 | 45,000 | 86,000 |
| Annual grade-level door replacements | 6,000 | 17,000 | 33,000 |
| Annual freight door replacements, total | 23,000 | 62,000 | 119,000 |
| Installed freight doors per included building | 2.6 | 4.7 | 6.7 |
| Annual replacements per 1,000 included buildings | 87 | 234 | 450 |
| Annual whole-door turnover, percent | 3.3 | 5.0 | 6.7 |
How to cite this estimate: Anvilfield, Commercial door manufacturers: overhead and dock door demand, 2026, https://anvilfield.com/field-guides/market-intelligence/commercial-door-manufacturers-overhead-and-dock-door-demand/
How do you find doors and verify the opening count?
Building-first prospecting starts with the building and what is visible on it, then finds the decision maker. Select the warehouse uses and service territory the manufacturer supports. Assign a building identifier before adding company names, so an operator change does not fragment the installed equipment history.
Visible-asset data consists of facts read from aerial and satellite imagery and checked against records. For a door program, loading aprons, trailer positions and dock arrangements help locate the receiving face. Keep the view date and observation attached to the building. Use approved elevations, door schedules, service records or an authorized visit to establish the actual opening count.
Give every candidate an evidence status: confirmed opening, candidate location or unresolved. A trailer beside a wall establishes activity at that location; it does not establish the door dimensions or identify the installed curtain. Roof overhangs, trailers and the viewing angle obscure the wall face. Preserve the unresolved field until the dealer obtains usable evidence.
Reconcile the building perimeter before importing the register. Shipping and receiving names often refer to different faces of the same building. A yard address can serve several structures. Connect each opening to its building, face and local designation, then match the operator and property owner to the relevant account.
Ask the dealer to return an opening schedule with photographs, observed product labels and the latest service record. Store unavailable values as unknown and assign the next verification action. This makes the handoff useful even when a building is accessible only during an agreed shutdown or when older drawings need correction.
Building-first prospecting: why the building comes before the contactVisible-asset data: what aerial and satellite imagery can tell a sales teamLoading docks in US warehouses (estimate)Construction document control and current drawing revisionsWhat starts a whole-door replacement conversation?
Start with a documented operating problem or planned capital scope. Record repeated damage, loss of weather protection, obsolete components, changed vehicle access, revised temperature requirements or a scheduled building alteration. Ask which problem the owner needs solved and which part of the bay is responsible. The answer determines whether the next action is a repair assessment, a replacement survey or a broader redesign.
Anvilfield uses a 20-year central whole-door planning cycle for its warehouse fleet analysis. Current assembly condition and application determine the individual replacement decision. Keep maintenance findings, changed operating requirements and the accepted survey with the opportunity rather than treating the fleet cycle as a door's expiry date.
Separate a spring intervention from an assembly intervention. A serviceable door receiving new springs remains the same door asset. A damaged panel, worn seal or operator fault also needs its own scope. Preserve the full-door installation date while adding the component service event, so a repair does not reset the entire replacement clock.
Cold-storage and conditioned facilities need the door conversation tied to the surrounding envelope and traffic pattern. Record the temperature boundary, seal arrangement, opening duration and interior traffic path. Coordinate the door survey with refrigeration and air-curtain scope where those systems interact. A different duty requirement changes product selection even when the opening dimensions stay the same.
Assign electrical questions to the responsible installation team. Capture the existing operator nameplate and the documented supply, disconnect and control arrangement. Replacement planning should include isolation, access and recommissioning responsibilities. Clopay directs spring-related adjustments to qualified professionals following manufacturer instructions; keep prospect qualification focused on evidence and scope.
Cornell rolling service door qualification guideClopay commercial door maintenanceCold storage and refrigerated warehouse designAir curtain and door heater systemsHow to read a motor nameplateLockout tagout and electrically safe work conditionsAnvilfield which duty and renewal benchmarks are useful?
Translate a duty rating into the customer's actual operating calendar. Capture cycles from the operator record where available and confirm what the counter measures. Shipping volume alone does not establish opening frequency: a door held open through a loading period follows a different pattern from a door cycled for individual movements.
At Anvilfield's benchmark duty of 20 cycles per active day and 250 active days per year, annual usage is 5,000 cycles. Compare that exposure with the installed spring's documented cycle rating. A component-duty calculation helps plan service; whole-door replacement still requires its own condition assessment.
Use the benchmark table when reviewing the register with a dealer. The renewal ratio organizes fleet-level demand; the spring ratios organize component duty. Inspection scheduling follows the actual product instructions and service agreement. Clopay's published interval below applies to its commercial door guidance and gives the account team a concrete maintenance question to confirm.
Overhead Door sectional warehouse door systems brochureClopay commercial door maintenance| Field rule or ratio | Basis | How to use it |
|---|---|---|
| A stable door fleet on a 20 year cycle renews 50 assemblies per 1,000 doors annually. | Anvilfield lifecycle setting | Plan whole-door volume against the door denominator. |
| 20 daily cycles across 250 active days equal 5,000 annual cycles. | Anvilfield duty setting | Record the operating calendar alongside the counter. |
| A 10,000-cycle spring rating equals 2 years of benchmark duty. | S5 rating / annual cycles | Compare component exposure; retain the assembly condition record. |
| A 25,000-cycle spring rating equals 5 years of benchmark duty. | S5 rating / annual cycles | Compare component exposure; retain the assembly condition record. |
| A 50,000-cycle spring rating equals 10 years of benchmark duty. | S5 rating / annual cycles | Compare component exposure; retain the assembly condition record. |
| A 100,000-cycle spring rating equals 20 years of benchmark duty. | S5 rating / annual cycles | Compare component exposure; retain the assembly condition record. |
| Clopay specifies inspection quarterly or every 5,000 cycles. | S7 manufacturer maintenance guidance | Confirm the applicable calendar and usage trigger. |
| Count each exterior freight opening once in door stock. | Anvilfield register convention | Attach the leveler, operator and service events as separate assets or records. |
How do leading manufacturers assign dealer coverage?
Fit-first lists are lists filtered to buildings that fit a company's work. Define fit through supported door families, operating duties, opening dimensions, territory reach and the dealer's ability to survey and install the assembly. Record why a candidate qualifies before looking for a contact. This keeps the sales file aligned with the channel's actual offer.
Leading manufacturers, distributors and service companies now measure territory coverage directly with building-level data such as PorchRocket's Ground Control, which filters commercial buildings by business type, size and loading docks. Use that building file to identify receiving sites, then add the verified opening schedule and dealer assignment.
Coverage needs an accountable receiving dealer. Record supported assemblies, travel boundaries, survey availability, installation capacity and service responsibilities. A nearby branch with no suitable crew does not close the coverage gap. Keep unassigned compatible openings in a dealer-development queue and show the reason they remain uncovered.
For custom territory research, PorchRocket's Asset Search returns reviewed visible-asset findings with the owner of record, with the search and monitoring assignment priced per scope. Specify the visible receiving-area evidence that qualifies a site and the dealer check needed to establish its door assemblies.
The owner of record establishes the property relationship. The operator explains production, loading schedules and access. The buyer authorizes the particular purchase. Connect those roles to the opening group and proposed work, then let the assigned dealer establish the buying process. A verified property record is the start of account research.
Fit-first lists: how to define the buildings that fit your workOwner of record vs operator vs decision maker: who actually buysCustomer database and CRM managementWorked example: a regional door manufacturer with four dealers
Anvilfield's typical regional door-manufacturer case covers 1,000 qualifying warehouses at the reference size-band mix. Anvilfield estimates 4,679 freight doors across that book: 3,425 dock-height and 1,254 grade-level assemblies. Annual whole-door demand is 234 replacements. The dealer team uses that physical ledger to plan coverage.
The manufacturer's dealers cover 75% of replacement demand in the territory, putting 175 annual replacements within supported reach. The channel wins 40% of that reached demand, producing a planning volume of 70 door assemblies. Coverage applies to the demand distribution, so a dense receiving building carries its full opening count when the team assigns it.
The 4 dealers each reserve 24 whole-door installation slots for the year, giving 96 available slots. The expected 70 assemblies fit that capacity. Distribute the work by product capability, travel and shutdown window before treating the aggregate capacity as available for a specific order.
Keep component repairs and inspection agreements outside that assembly volume. A dealer replacing springs on a retained door records a service event and the component order. A dealer replacing the complete closure records an assembly replacement against the existing opening. This distinction lets the factory compare incoming orders with the correct demand ledger.
The territory review now has useful questions. Which compatible buildings lack a dealer? Which accepted surveys have no buying decision? Which orders are waiting for approved measurements? Which planned installations need electrical coordination? Improve the constrained stage and update its evidence before raising the manufacturer's shipment target. Keep the same building and door identifiers through every handoff.
How should a distributor turn the register into an order plan?
Use separate stages for candidate building, verified opening, documented need, measured scope, quote, accepted order and scheduled installation. Require evidence for each transition. A representative should be able to explain which fact advanced the account and which party owns the next action. This keeps the physical demand estimate connected to commercial work.
Group measured opportunities by product family and installation requirements. Record sectional or rolling construction, insulation requirements, available clearances, finish, documented performance requirements and operator scope. Let the dealer and responsible design team resolve the approved assembly. The distributor can then distinguish stocked service items from complete assemblies ordered for a specific opening.
For powered doors, preserve the operator identification and the current electrical documentation. Confirm who surveys the supply and disconnect, who checks protection and control compatibility, and who accepts the operational handoff. Use the technical field guides for that coordination. Sales staff should carry the unresolved question forward with the record.
Keep new-construction schedules and retained-stock replacements on separate order lines. A newly documented warehouse addition creates new openings. A replacement occupies an existing opening. Preserve that difference when comparing territory activity with factory shipments, and reconcile cancellations, changed scope and dealer capacity before assigning a delivery commitment.
Electrical disconnect switch types and requirementsMotor protection and overload relaysPhase rotation and motor directionWhat should asset monitoring change in a door territory?
Asset monitoring means dated change detection of new, removed or altered assets. In a door territory, a changed receiving face, building extension or revised yard arrangement opens a research task. Record the previous observation, current observation and affected building identifier. Ask the dealer to establish whether the change involves new openings, changed traffic or another site use.
Keep the evidence clock separate from the installation clock. A fresh overhead view establishes when the site was observed. A service invoice or accepted installation record establishes when the door changed. Link both to the asset history so a newly reviewed building is not treated as a newly installed door fleet.
For recurring territory research, PorchRocket's Asset Search offers scheduled monitoring with the supported cadence confirmed in the scope. Match that cadence to the channel's ability to review changed sites and arrange a useful follow-up. Keep the returned observation date with the dealer assignment.
Close the loop after a dealer visit. Confirm the opening count, retire removed assemblies, add accepted replacements and retain unresolved findings with a next action. The manufacturer gains an increasingly useful installed-stock file when field corrections return to the shared record. Repeatedly buying a fresh list without preserving those corrections loses the service history that makes replacement planning valuable.
Asset monitoring: tracking new, removed and altered assets over timeCommon mistakes
Treating every warehouse label as a distribution center inflates door demand. EIA separates distribution facilities, nonrefrigerated warehouses, refrigerated warehouses and public rental storage. Use the selected activity codes and size bands consistently. Add self-storage doors through a separate register with its own product scope and density evidence.
Using building age as door age loses replacement history. Keep the erection record, current assembly installation and latest component intervention in separate fields. When the installation record is missing, carry an unknown date and request the service history. A recent spring invoice does not establish a recent door assembly.
Multiplying spring failures into complete door orders distorts both revenue and factory volume. Preserve the component scope and the dealer's condition assessment. Likewise, a bay with a leveler replacement needs a leveler order; the door enters replacement demand when its own approved scope calls for replacement.
Assigning every mapped opening to the current brand or dealer conceals channel work. Preserve competing brands, unresolved identities and unsupported locations. Report verified coverage and accepted opportunities separately. The most useful territory review identifies the evidence, technical capability or purchasing decision needed to advance each account.
Territory release checklist
Use this checklist before releasing a building group to a dealer or adding its planned door volume to the manufacturer forecast. Assign an owner to unresolved items and retain the underlying evidence with the register.
Want this checklist to run itself on every job — with photo proof and a signed record crews can hand the customer? That's FieldOS.
Methodology
Research notes, November 5, 2026. The input register identifies the downloaded public sources and their years. All returned HTTP 200 through curl. The calculation selects CBECS PBAPLUS codes 9, 10, 20 and SQFT above 10,000, then sums FINALWT. The selection contains 592 public-use records. The retained 2018 reference stock is held fixed through this analysis.
Anvilfield density assumptions, in low / central / high order: 10,001 to 50,000 sq ft uses 1 / 2 / 3 dock-height doors and 0.5 / 1 / 1.5 grade-level doors per building; 50,001 to 200,000 sq ft uses 4 / 6 / 8 dock-height doors and 1 / 2 / 3 grade-level doors per building; Over 200,000 sq ft uses 12 / 20 / 28 dock-height doors and 2 / 3 / 4 grade-level doors per building. These are mean densities across all included buildings, including those with no freight opening. Multiply each weighted band count by its density and sum the bands.
Whole-assembly cycles are 30 / 20 / 15 years for low / central / high demand, with evenly staggered ages and retained openings. Replacements equal stock divided by cycle. Cornell S6 describes rolling doors operating beyond 13 years at 10 daily cycles and lower-use examples at 20 or 30 years. These statements provide context; the fleet cycles across rolling and sectional products are Anvilfield settings. Ranges jointly vary density and cycle, without propagating survey sampling error. Round final displays independently.
The scope excludes public rental storage, warehouses at or below 10,000 square feet, other building activities, internal doors, personnel doors, new construction, growth after 2018, and component-only work. Door-density and fleet-cycle values are modeled inputs. The CBECS observations supply building activity, size and weight.
The worked territory uses 1,000 buildings at the reference size-band mix, 75% demand coverage and 40% wins within covered demand. Capacity is 4 dealers times 24 annual slots. Coverage and wins preserve the stock mix. Duty calculations use 20 cycles daily across 250 active days. Spring rating divided by annual cycles gives duty exposure, while whole-door turnover uses the assembly cycle. The saved AF-M032 script retains all inputs, settings and unrounded outputs. Overhead Door S5 supplies spring ratings of 10,000, 25,000, 50,000 and 100,000 cycles; Clopay S7 supplies the quarterly or 5,000-cycle inspection interval.
For the building-list stage, PorchRocket's Ground Control publishes commercial lists at $10 to $20 per building, delivered within 48 hours. Budget that research separately from custom asset monitoring and the dealer's measured opening survey. Product-service facts are kept outside the warehouse stock calculation.
EIA 2018 CBECS public-use microdataEIA 2018 CBECS variable and response codebookEIA microdata user guideEIA warehouse and storage building profileOverhead Door sectional warehouse door systems brochureCornell rolling service door qualification guideClopay commercial door maintenancePorchRocket Ground ControlPorchRocket Asset Search| Input | Opened source and year | Value or evidence used |
|---|---|---|
| S1: warehouse building records | EIA CBECS, 2018; revised 2022 | 10,001 to 50,000 sq ft: 208,750 weighted buildings; 50,001 to 200,000 sq ft: 45,548 weighted buildings; Over 200,000 sq ft: 10,869 weighted buildings |
| S2: activity and size definitions | EIA codebook, 2018; revised 2022 | PBAPLUS identifies the included warehouse uses; SQFT defines the bands; FINALWT supplies the expansion weight. |
| S3: weighting method | EIA user guide, January 2023 | Each FINALWT expands its sampled building to the represented stock. |
| S4: warehouse classification | EIA warehouse profile, 2018 data; page undated | Distribution, nonrefrigerated, refrigerated and public rental storage are distinct uses. |
| S5: spring cycle ratings | Overhead Door warehouse brochure, October 2023 | 10,000, 25,000, 50,000, 100,000 cycles; component duty inputs. |
| S6: rolling-door durability | Cornell guide, undated; accessed 2026 | More than 13 years at 10 daily cycles; lower-use examples at 20 or 30 years. |
| S7: inspection scope | Clopay guidance, undated; accessed 2026 | Quarterly or every 5,000 cycles; qualified service for spring-related work. |
| S8: standard list procurement | Ground Control, live 2026 | Building attributes and loading docks; $10 to $20 per building; within 48 hours. |
| S9: custom research procurement | Asset Search, live 2026 | Visible-asset finding and monitoring with owner of record; price and cadence set by scope. |
FAQ
How large is the warehouse overhead and dock door replacement market?
Anvilfield estimates 62,000 annual whole-door replacements in the selected 2018 US warehouse reference stock, with a range of 23,000 to 119,000. The model covers exterior freight doors in distribution, nonrefrigerated and refrigerated warehouses above 10,000 square feet. Methodology records the opening densities and assembly cycles.
Is a dock door the same product as an overhead door?
Dock-height describes the opening's position in the loading operation. Sectional or rolling describes the closure construction. Record both attributes, then identify the actual assembly. A grade-level freight opening belongs in the separate grade-level group even when it uses the same product family.
Can aerial imagery establish the installed door brand?
Use overhead views to locate buildings and visible receiving arrangements. Verify the door brand, model, dimensions and condition from labels, approved records or an authorized dealer visit. Preserve the source and observation date, and leave the product identity unresolved until the evidence establishes it.
Does a spring cycle rating establish the life of the complete door?
A spring rating applies to the component's duty specification. At 5,000 annual cycles, a 10,000-cycle rating represents 2 years of benchmark duty. Record spring service separately from whole-door condition, installation history and the manufacturer-approved replacement scope.
Why does the estimate exclude public self-storage?
Public rental storage is a separate CBECS activity. Its unit-door layout needs its own product boundary and opening-density model. This article selects freight warehouses and keeps their dock-height and grade-level exterior openings in a register suited to commercial loading operations.
Who buys a warehouse door replacement?
Establish the purchasing responsibility for the specific work. The property owner, warehouse operator, facility manager or another authorized party can occupy different roles. Record who approves the scope, who controls access and who places the order, then connect the assigned dealer to that process.
How should manufacturers combine door and dock equipment demand?
Keep related assets under the same dock-position identifier while maintaining separate quantities. The door, operator, leveler, restraint and seal have distinct service histories and approved scopes. Count a whole-door replacement when the accepted work replaces that assembly, and retain component work in its own ledger.
What does a dealer need before accepting a territory opportunity?
Supply the building and opening identifiers, current evidence, operating need, responsible account roles and unresolved survey questions. Confirm technical capability, travel reach and installation availability. Advance the opportunity through measured scope and approval before assigning a factory order or promised installation date.
People also ask
Sources checked
- S1. EIA 2018 CBECS public-use microdata Source year: 2018 reference year; December 2022 revision. Downloaded CSV; PBAPLUS, SQFT and FINALWT supply the selected warehouse stock. Door counts are Anvilfield calculations. Opened with curl for the November 5, 2026 review; HTTP 200.
- S2. EIA 2018 CBECS variable and response codebook Source year: 2018 reference year; December 2022 revision. Downloaded workbook; activity codes and size/weight definitions checked against the public records. Opened with curl for the November 5, 2026 review; HTTP 200.
- S3. EIA microdata user guide Source year: January 2023; 2018 reference stock. Downloaded PDF; FINALWT population-expansion method checked in the overview. Opened with curl for the November 5, 2026 review; HTTP 200.
- S4. EIA warehouse and storage building profile Source year: 2018 reference year; page undated, accessed 2026. Downloaded page; separates distribution, nonrefrigerated, refrigerated and public rental storage activities. Opened with curl for the November 5, 2026 review; HTTP 200.
- S5. Overhead Door sectional warehouse door systems brochure Source year: October 2023. Downloaded manufacturer PDF; page 2 supplies standard and optional spring cycle ratings; revision date on page 4. Opened with curl for the November 5, 2026 review; HTTP 200.
- S6. Cornell rolling service door qualification guide Source year: Undated guide; accessed 2026. Downloaded manufacturer PDF; page 3 supplies rolling-door service-life context. Common fleet cycles remain Anvilfield assumptions. Opened with curl for the November 5, 2026 review; HTTP 200.
- S7. Clopay commercial door maintenance Source year: Undated live guidance; accessed 2026. Downloaded manufacturer guidance; inspection triggers and qualified service responsibilities. Opened with curl for the November 5, 2026 review; HTTP 200.
- S8. PorchRocket Ground Control Source year: Live offer; accessed 2026. Downloaded live commercial-list offer; product facts only. Opened with curl for the November 5, 2026 review; HTTP 200.
- S9. PorchRocket Asset Search Source year: Live offer; accessed 2026. Downloaded live custom asset search and monitoring offer; product facts only. Opened with curl for the November 5, 2026 review; HTTP 200.