- acec-co.org (American Consulting Engineers Council of Colorado)
- aiacolorado.org (American Institute of Architects / Colorado)
- steel.org (American Iron and Steel Institute)
- aisc.org (American Institute of Steel Construction)
- strongtie.com (Simpson Strong-Tie)
- trusjoist.com (Trus-Joist)
- awc.org (American Wood Council)
- gostructural.com (Structural Engineer Magazine)
- asce.org (American Society of Civil Engineers)
- astm.org (American Society for Testing and Materials)
- nahb.com (National Association of Home Builders)
- ncma.org (National Concrete Masonry Association)
- nspe.org (National Society of Professional Engineers)
- sdi.org (Steel Deck Institute)
- crsi.org (Concrete Reinforcing Steel Institute)
- lgsea.com (Light-Gauge Steel Engineers Association)
- agccolorado.org (Associated General Contractors of Colorado)
- ncees.org (Professional Engineers Licensing Board)
- firstsourceonl.com (Codes, costs, products)
- ansi.org (American National Standards Institute)
- portcement.org (Portland Cement Association)
- seacolorado.com (Structural Engineers Association of Colorado)
- ncsea.com (National Council of Structural Engineers Associations)
- icbo.com (International Council of Building Officials)
- woodtruss.com (Wood Truss Council of America)
- aws.org (American Welding Society)
- masonrysociety.org (Masonry Society)
- LGSframing.com (Light-Gauge steel framing)
- simpsonanchors.com (concrete/masonry anchors)
- steelnetwork.com (Light-gauge steel products)
- us.hilti.com (anchoring systems)
- finehomebuilding.com (Fine Homebuilding Magazine)
- psmj.com (Professional Services Management Journal)
- abchance.com (steel helical piers)
- masonryresearch.org (Council for Masonry Research)
- woodfocus.com (Canadian Wood Council)
- sermc.org (Structural Engineers Risk Management Council)
- http://www.icc-es.org ( ICC Evaluation Services, Inc.)