TrimJoist

What TrimJoist does

TrimJoist is a third-generation, family-owned U.S. manufacturer of a patented, trimmable open-web floor joist system for residential and light commercial construction. The core product combines the field trimmability of a wood I-joist with the open-web configuration of a floor truss, enabling mechanical, electrical, and plumbing routing through the floor cavity while allowing on-site length adjustment without factory lead times. The system features 3.5-inch-wide nailing flanges for squeak-resistant installations, depth-dependent camber for dead load compensation, and spans up to 32 feet at maximum depth. Two patents (U.S. 5,761,872 and U.S. 6,139,667) cover the trimmable joist design, and TrimJoist is described as the only corporation with a patent on a trimmable floor joist. The company manufactures steel connector plates in-house and operates two production facilities in Columbus, Mississippi and Kuna, Idaho, with products made entirely from domestically sourced lumber and components.

The company distributes exclusively through authorized dealers and distributors who maintain stock inventories for immediate availability, supplemented by factory-direct truck-load delivery (8,000-11,000 linear feet) in geographies without dealer coverage. Pricing is set by dealers and not publicly disclosed. The customer base spans multi-family residential construction (including student housing and apartments), custom and high-end residential builds, basement construction, and AEC professionals. Notable projects include Haggett Hall at the University of Washington (230,000 SF) and HGTV-featured Pinhoti Peak. The go-to-market relies on an in-house engineering staff providing plan conversion, design layout, and project-specific framing plans and material lists, supported by TrimJoist Analyzer software (launched December 2025) for structural analysis by design professionals. Strategic partnerships include Freres (Mass Ply Panels) and Engineered Wood Solutions in the co-developed 'Trim-Ply System' for multi-family construction, and a brand relationship with HGTV designer Chip Wade for premium residential visibility.

Revenue is generated through one-time sales of physical floor joist products in stock lengths (24-inch increments from 4 feet to depth-dependent maximums), with no subscription, licensing, or recurring software revenue disclosed despite the free Analyzer tool. The company is privately held with no external funding, parent company, or public listing indicated. Recent strategic activity includes the 2023 Idaho plant expansion, the 2025 TrimJoist Analyzer software launch, the November 2025 '100% Built in America' campaign aligned with Build America, Buy America Act compliance, and the May 2026 Haggett Hall case-study publication establishing the Trim-Ply System approach.

Name

TrimJoist

Legal name

Trimjoist Corporation & Trimjoist West, Inc.

Website

https://trimjoist.com

Company type

Private

Founded year

1994

Operating status

Operating

Headcount range

11–50 employees

Short description

TrimJoist is a third-generation, family-owned U.S. manufacturer of a patented, trimmable open-web floor joist system sold through authorized dealers to builders, architects, and contractors in multi-family, custom residential, and basement construction markets.

Ownership category

akta.pro rank

Product category

Engineered Wood Floor Joists

NAICS

Custom Architectural Woodwork and Millwork Manufacturing (337212)

SIC

Lumber & Wood Products (No Furniture) (2400)

akta.pro primary industry

I-Joists & Structural Composite Lumber (PSL, LSL) Manufacturing (IMAMACAH)

Keywords

• Engineered wood joists
• Floor framing systems
• Open-web trusses
• Structural building products
• Trimmable floor joists

Headquarters

HQ city

Columbus

HQ country

United States

HQ region

North America

Offices2 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Operations, Personnel, Marketing or Sales, Technology or R&D

Revenue model

1. Floor Joist Product Sales: TrimJoist generates revenue through the sale of trimmable open-web floor joist products distributed via authorized dealers and distributors. Products are manufactured in standard stock lengths (24-inch increments from 4 feet to depth-dependent maximums) and are also available direct from factory in truck-load quantities (typically 8,000 to 11,000 linear feet).

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels7 records

Core offering

TrimJoist manufactures and sells a patented, trimmable open-web floor joist system that combines the field trimmability of wood I-joists with the open-web flexibility of floor trusses for routing mechanical, electrical, and plumbing systems. Products are manufactured in 12 to 20-inch depths with maximum spans of 24 to 32 feet, sold in standard stock lengths at authorized dealers across the U.S., and supported by in-house engineering, sizing software, and factory-direct truck-load delivery.

Product overview

TrimJoist offers a unified product portfolio centered on its patented TrimJoist trimmable open-web floor joist system. The core product combines the field trimmability of a wood I-joist with the open-web design of a floor truss, enabling mechanical systems routing through the floor cavity. Supporting the core product is TrimJoist Analyzer sizing software (free to design professionals) and comprehensive Technical Guides for Southern Pine and Douglas Fir variants. All products are manufactured 100% in the USA with domestic sourcing.

Differentiator

Problem solved

Functional benefit

Brands

• TrimJoist Analyzer: Free single-member sizing software for architects, engineers, and designers using TrimJoist products.

Products and services

• TrimJoist Floor Joist System A patented, trimmable open-web floor joist system combining the field trimmability of a wood I-joist with the open-web flexibility for MEP routing. Manufactured in depths from 12 to 20 inches with maximum spans of 24 to 32 feet, featuring 3.5-inch wide nailing flanges and depth-dependent camber. Manufactured 100% in the USA at facilities in Mississippi and Idaho. Sold to architects, engineers, builders, and contractors for multi-family, custom residential, and commercial construction.
• TrimJoist Analyzer Free single-member joist analysis software for architects, engineers, and designers to evaluate TrimJoist suitability and performance at various loadings, spans, and spacings. Features adjustable design settings, professional PDF report generation, and a JSON interface for power users integrating with iStruct (Simpson Strong-Tie). Available for Windows and Mac.

Quantifiable outcome

• 120% productivity gain in floor framing installation
• +5 more outcomes

Named customers3 records

Segments5 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration1 record

Feature7 records

Partnerships

Three partnerships are on record, tiered core.

• Engineered Wood SolutionscoreStrategic or Co-development PartnerDeveloped the "Trim-Ply System" concept combining TrimJoist floor joists + Freres Mass Ply Panels + Tall Wall Framing Approach, which was proven on the Haggett Hall project. This integrated system approach addresses modern multi-family construction challenges including MEP density, fire and acoustic assemblies, and construction schedule acceleration.
• FrerescoreTechnology or IntegrationFreres Mass Ply Panels are a complementary product used in the Trim-Ply System alongside TrimJoist. The 4-inch Mass Ply Panels are used in corridor areas, manufactured to corridor widths and up to 48 feet in length, minimizing cuts and handling while creating solid working surfaces with clear routing channels.
• Chip WadecoreStrategic or Co-development PartnerAward-winning designer and builder who has featured TrimJoist in multiple HGTV projects including Pinhoti Peak. Wade recommends TrimJoist for premium builds requiring long spans and stiff, quiet floors, and introduced the product to other clients including country music artist John King.

Scale indicators4 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• RedBuilt: RedBuilt manufactures open-web floor trusses and engineered wood I-joists for commercial and residential construction, directly competing with TrimJoist on long-span, MEP-friendly floor framing systems.
• Anthony Forest Products: Anthony Forest Products manufactures engineered wood I-joists and related structural components for the residential construction market, directly competing with TrimJoist in the I-joist floor framing category.

Broad incumbents

• Boise Cascade Engineered Wood: Boise Cascade is a large, vertically integrated manufacturer of I-joists and engineered wood products (including the legacy iLevel brand), competing with TrimJoist across residential and multi-family floor framing as a broader portfolio incumbent.
• LP Building Solutions (Louisiana-Pacific): LP Building Solutions produces engineered wood I-joists (LP I-Joists) and other structural framing products, competing with TrimJoist in residential floor systems as a national broad-line building products manufacturer.
• Weyerhaeuser (Engineered Wood Products): Weyerhaeuser's engineered wood products business produces I-joists and structural framing used in residential and multi-family construction, overlapping directly with TrimJoist's floor joist offering as a deep-pocketed forest products incumbent.

Regional players

• Stark Truss / Stark Group: Stark Truss manufactures floor and roof trusses including open-web configurations serving regional US markets, providing direct overlap with TrimJoist's open-web floor joist product in multi-family and residential construction.

Others

• MiTek Industries: MiTek supplies steel connector plates and truss design software used by floor and roof truss manufacturers, including TrimJoist; it is an enabling ecosystem supplier rather than a direct joist competitor but shapes the same engineered wood category.
• Simpson Strong-Tie: Simpson Strong-Tie manufactures structural connector plates, hangers, and the iStruct design platform that integrates with TrimJoist Analyzer; it is both a referenced supplier (N10HDGPT500, THA-422) and a software ecosystem partner rather than a direct joist competitor.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/trimjoist
• Facebookfacebook.com/trimjoist

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Subsidiaries1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about TrimJoist