Interactive reference tools, classification systems, and utilities to support estimators, contractors, architects, and construction professionals.
Free interactive guides for construction classification and documentation standards
Interactive guide to the Construction Specifications Institute's standard classification system. Browse all 50 divisions with 8,800+ searchable codes.
Open ToolComprehensive reference for Australia's National Building Specification system. Includes NATSPEC building worksections and AUS-SPEC infrastructure.
Open ToolThe unified classification system for the UK construction industry. Browse 12,400+ items across Complexes, Entities, Activities, Spaces, Elements, Systems, and Products.
Open ToolThe OmniClass Construction Classification System. Browse 8,500+ items covering Space by Function, Elements, and Work Results tables.
Open ToolASTM E1557 elemental classification for building systems and assemblies. Essential for preliminary estimating and cost planning by building element.
Open ToolView and explore IFC (Industry Foundation Classes) BIM files directly in your browser. Extract quantities, view model hierarchy, and inspect element properties.
Open ToolEssential construction formulas for area, volume, concrete, masonry, roofing, earthworks, steel, and finishes. All calculations in metric with waste factors.
Open ToolConvert between metric and imperial measurements for length, area, and volume. Essential tool for working with international drawings and specifications.
Open ToolComprehensive guide to purchasing units in construction - pallets, bundles, bags, sheets, rolls, and 50+ more. Essential for accurate procurement and estimating.
Open ToolTrade-by-trade scope checklists covering 12 trades and 180+ items. Track progress, save state, and ensure nothing is missed in your estimates.
Open ToolAustralian (ASMM) and UK (NRM2) measurement rules for all trades. Learn correct units, deduction rules, and what to include in quantities.
Open ToolReference guide for architectural, structural, mechanical, electrical, and plumbing symbols used in construction documentation.
Open ToolSearchable database of 300+ construction abbreviations across all trades. Filter by category with instant search.
Open ToolStandard prefixes, sheet numbering systems, and file naming protocols for construction drawings and documentation.
Open ToolSearchable guide to IFC classes and properties. Core, Shared, Domain and Resource entities with property sets and usage notes.
Open ToolLevel of Development expectations from LOD 100 to LOD 500. Geometric detail, data requirements, and project stage mapping.
Open ToolConstruction Operations Building information exchange worksheets. Core and supporting sheets, data relationships and validation.
Open ToolInformation Delivery Specification standard. Facets, requirements, XML structure, and common use cases for BIM validation.
Open ToolbuildingSMART Data Dictionary concepts. Dictionaries, classifications, properties, API integration and best practices.
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