• Air-Conditioning and Refrigeration Institute (ARI)
• Air Conditioning Contractors of America (ACCA)
• Alliance to Save Energy
• American Arbitration Association (AAA)
• American Architectural Manufacturers Association (AAMA)
• American Consulting Engineers Council (ACEC)
• American Concrete Institute (ACI)
• American Gas Association (AGA)
• American Institute of Architects (AIA)
• American Institute of Building Design (AIBD)
• American Institute of Steel Construction (AISC)
• American Iron and Steel Institute (AISI)
• American Society of Civil Engineers (ASCE)
• American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE)
• American Society for Healthcare Engineering (ASHE)
• American Society of Interior Designers (ASID)
• American Society of Mechanical Engineers (ASME)
• American Society of Plumbing Engineers (ASPE)
• American Society of Professional Estimators (ASPE)
• Arizona Contractors Association (ACA)
• ASFE
• Associated Builders and Contractors (ABC)
• Associated General Contractors of America (AGC)
• Associated Owners and Developers (AOD)
• Association for the Advancement of Cost Engineering (AACE International)
• Association of Energy Engineers (AEE)
• Association for Facilities Engineering (AFE)
• Association of Higher Education Facilities Officers (APPA)
• Association of the Wall and Ceiling Industries (AWCI)
• Bath Enclosure Manufacturers Association (BEMA)
• Building Futures Council (BFC)
• Building Officials and Code Administrators International (BOCA)
• Building Owners and Managers Association International (BOMA)
• Code Compliance Council (CCC)
• Construction Management Association of America (CMAA)
• Construction Specifications Institute (CSI)
• Consulting Engineers Council of Texas (CEC-Texas)
• Council of American Structural Engineers (CASE)
• Council of Professional Surveyors (COPS)
• Deep Foundations Institute (DFI)
• Design-Build Institute of America (DBIA)
• Door and Hardware Institute (DHI)
• Edison Electric Institute (EEI)
• EIFS Industry Members Association (EIMA)
• Electrical Power Research Institute (EPRI)
• Factory Mutual (FM Global)
• Gas Research Institute (GRI)
• Glass Association of North America (GANA)
• glasswebsite.com
• Hearth Products Association (HPA)
• Illuminating Engineering Society of North America (IESNA)
• Institute of Electrical and Electronics Engineers Inc. (IEEE)
• Institute of Gas Technology (IGT)
• International Association of Lighting Designer (IALD)
• International Conference of Building Code Officials (ICBO)
• International Facility Management Association (IFMA)
• International Window Film Association (IWFA)
• International Society for Measurement and Control (ISA)
• Light Gauge Steel Engineers Association (LGSEA)
• Lean Construction Institute (LCI)
• Lighting Research Center (LRC)
• Metal Building Manufacturers Association (MBMA)
• Midwest Industrial Relocation Association (MIRA)
• National Association of Corporate Real Estate Executives (NACORE)
• National Clearinghouse for Educational Facilities (NCEF)
• National Concrete Masonry Association (NCMA)
• National Conference of States on Building Codes and Standards, Inc (NCSBCS)
• National Council of Acoustical Consultants (NCAC)
• National Council of Architectural Registration Boards (NCARB)
• National Electrical Contractors Association (NECA)
• National Electrical Manufacturers Association (NEMA)
• National Fire Protection Association (NFPA)
• National Fire Sprinkler Association (NFSA)
• National Society of Professional Engineers (NSPE)
• National Sunroom Association (NSA)
• New York City Fire Safety Director's Association
• North American Association of Mirror Manufacturers (NAAMM)
• North American Insulation Manufacturers Association (NAIMA)
• North American Steel Framing Alliance (NASFA)
• Plumbing Manufacturers Institute (PMI)
• Precast/Prestressed Concrete Institute (PCI)
• Preservation Trades Network (PTN)
• Primary Glass Manufacturers Council (PGMC)
• Professional Construction Estimators Association of America (PCEA)
• Project Management Institute (PMI)
• Protective Glazing Association (PGA)
• Single Ply Roofing Institute (SPRI)
• Small Firm Council (SFC)
• Society of Fire Protection Engineers (SFPE)
• Southern Building Code Congress International (SBCCI)
• StoneInfo.Com
• Underwriters Laboratories Inc. (UL)
• Valve Manufacturers Association of America (VMA)
• Western Construction Consultants Association (WESTCON)
• Window & Door Manufacturers Association (WDMA)

Government agencies                       

• Environmental Protection Agency (EPA)
• Federal Emergency Management Agency (FEMA) including the Map Service Center
• National Institute of Building Sciences (NIBS)
• National Institute of Standards and Technology (NIST)
• Occupational Safety & Health Administration (OSHA), Department of Labor
• U.S. Army Corps of Engineers
• U.S. Census Bureau Construction Statistics
• U.S. Bureau of Land Management (BLM)
• U.S. Department of Energy (DOE)
• U.S. Department of the Interior (DOI)
• U.S. Department of Transportation (DOT)
• U.S. General Services Administration (GSA)
• U.S. Architectural and Transportation Barriers Compliance Board (The Access Board). Includes full text of the Americans with Disabilities Act Accessibility Guidelines.