American Association of State Highway and Transportation Officials (AASHTO)
www.transportation.org

American Coal Ash Association (ACAA)
www.acaa-usa.org

American Concrete Institute (ACI)
www.concrete.org

American Concrete Pavement Association (ACPA)
www.acpa.org

American Concrete Pumping Association (ACPA)
www.concretepumpers.com

American Institute of Architects (AIA)
www.aia.org 

American Railway Engineering and Maintenance-of-Way Association (AREMA)
www.arema.org

American Road & Transportation Builders Association (ARTBA)
www.artba.org

American Society for Testing and Materials (ASTM)
www.astm.org

American Society of Civil Engineers (ASCE)
www.asce.org  

American Society of Concrete Contractors (ASCC)
www.ascconline.org

American Segmental Bridge Institute (ASBI)
www.asbi-assoc.org

American Welding Society (AWS)
www.aws.org

Architectural Precast Association (APA)
www.archprecast.org

Associated Builders and Contractors (ABC)
www.abc.org

Associated General Contractors of America (AGC)
www.agc.org 

CSA Group
www.csagroup.org

Cement Association of Canada (CAC)
www.cement.ca

Concrete Foundations Association (CFA)
www.cfawalls.org

Concrete Industry Foundation (CIF)
www.concreteindustryfoundation.org

Construction Specifications Institute (CSI)
www.csinet.org

Expanded Shale, Clay and Slate Institute (ESCSI)
www.escsi.org

Epoxy Interest Group (EIG)
www.epoxyinterestgroup.org

Federal Highway Administration (FHWA)
www.fhwa.dot.gov

Insulating Concrete Form Association (ICFA)
www.forconstructionpros.com

National Concrete Bridge Council (NCBC)
www.nationalconcretebridge.org

National Concrete Masonry Association (NCMA)
www.ncma.org

National Council of Structural Engineers Associations (NCSEA)
www.ncsea.com

National Ready Mixed Concrete Association (NRMCA)
www.nrmca.org

Portland Cement Association (PCA)
www.cement.org

Post-Tensioning Institute (PTI)
www.post-tensioning.org

Precast/Prestressed Concrete Institute (PCI)
www.pci.org

Reinforcing Steel Institute of Canada (RSIC)
www.rebar.org

Silica Fune Association (SFA)
www.silicafume.org

The International Code Council (ICC)
www.iccsafe.org

Tilt-Up Concrete Association (TCA)
www.tilt-up.org

Wire Reinforcement Institute (WRI)
www.wirereinforcementinstitute.org