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CLT Toolbox / SPEC Toolbox

Structural engineering automation for mass timber design

Web-based platform that automates structural design calculations for Cross-Laminated Timber (CLT), glulam, and timber connections. Eliminates manual spreadsheet work and provides real-time supply chain integration with timber manufacturers.

$3M (pre-Series A, 2025) raisedEarly Stage
Founded 2023 · 6,000+ user signups, 35+ timber product suppliers integrated, first U.S. CLT manufacturer (Sterling Structural) as production partner
Website → ← All Tools
WHY IT EXISTS

Why This Tool Exists

The Problem

Structural engineers spend days manually building spreadsheets to verify mass timber calculations (CLT floor/wall/beam design, connections). Complex wood engineering calculations are error-prone and slow to iterate, delaying project delivery and preventing designers from exploring cost-effective design alternatives. Knowledge gaps in mass timber design (not covered in traditional engineering curricula) further slow adoption of sustainable timber solutions.

The Solution

Web-based platform automates structural design calculations for CLT, glulam, and timber connections using Eurocode 5, AS1720, and CSA O86 standards. Turns days of manual calculations into minutes of automated analysis. Includes interactive design tools for beam/column/floor/wall/connection design with real-time supply chain integration from timber manufacturers (Sterling Structural, Mercer, Timber Unlimited) and educational resources to bridge knowledge gaps.

USAGE

How You Use It

Delivery Method
SaaSWeb ApplicationMobile App (iOS/Android)
Integrations
Mercer Mass Timber (digital integration)Sterling Structural (CLT/glulam supply chain)Timber UnlimitedRegional timber supplier catalogsEducational institutions
Disciplines
Structural Engineering, Architecture
Workflows
Data & Automation
Project Phases
Schematic Design, Design Development, Construction Documentation
Project Types
Commercial, Residential, Multi-Family, Institutional, Mixed-Use, Industrial
TRANSPARENCY

Data Transparency

Exactly what this tool uses and how

Input
What it needs
Required:Design parameters (span, load, material type), Design code selection (Eurocode 5, AS1720, CSA O86), Product specifications from integrated suppliers
Optional:Fire rating requirements, Acoustic specifications, Connection type preferences, Cost optimization parameters
Formats:Web form input, Product catalog data from manufacturers, Construction standards (Eurocode 5, AS1720, CSA O86)
Output
What you get
Format:Design reports with structural analysis and specification
Fields:Beam/column/floor/wall capacity checks, Connection design (dowel, bolt, splice specifications), Fire design ratings, Acoustic performance calculations, Cost estimates with manufacturer pricing, Specification-ready design documentation, Product compatibility matrix
Algorithm
How it works
Model:Proprietary calculation engine implementing Eurocode 5, AS1720.1, and CSA O86 design standards
Accuracy:Compliant with design standards (Eurocode 5, AS1720.1, CSA O86); accuracy depends on input data quality and manufacturer product specifications
Privacy
How your data is protected
Retention:Not publicly specified; project-based retention likely (contact vendor for details)
Training:Not publicly specified
Compliance:GDPR-aligned privacy policy (UK-based), Claims enterprise-grade security (specific certs not publicly disclosed)
API
Integration
Endpoint:Contact vendor for API access
Method:Not publicly documented
USE CASES

Use Cases

  • ·Automated CLT beam design with capacity verification against Eurocode 5 or AS1720 standards
  • ·Mass timber connection design (dowels, bolts, splices) using 17+ advanced calculators
  • ·Floor system design optimization comparing CLT vs. glulam options with real-time cost lookup
  • ·Rapid design iteration: change span, load, or material and get instant capacity verification
  • ·Supply chain integration: design directly with Sterling Structural or Mercer products to ensure availability
  • ·Fire design rating calculations with post-fire section analysis for regulatory compliance
  • ·Educational support: bridge knowledge gap for engineers new to mass timber design
  • ·Cost-value engineering: compare design alternatives and identify cost drivers
  • ·Acoustic performance calculation for multi-family residential projects
  • ·Specification-ready documentation generation for construction bid packages
PRICING

Pricing

Free
Free version available with limited features; free trial (no credit card required)
Pro
Pro Plan (ANZ): A$3,500 per user/year; Full access to CLT design, advanced connections, supply chain integration
Enterprise
Custom pricing for multi-user licenses, SSO, dedicated support, and security compliance
Sources & Research NotesResearch date: 2026-04-04
Data Sources (12)
Fields Checked (18)
problem, solution, deliveryMethod, integrations, disciplines, projectPhases, projectTypes, yearFounded, maturityStage, customerBase, fundingTotal, input-required, output-format, algorithm-approach, useCases, pricing-free, pricing-pro, rebranding-to-spec-toolbox
Not Found (7)
exact-employee-count, privacy-policy-specific-retention-days, soc2-certification, iso27001-certification, api-documentation, publicly-disclosed-accuracy-metrics, data-training-practices
About this research: This record summarizes the cited sources and fields checked. A research date does not establish hands-on testing. Consult the original sources for current details and limitations.
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