Systems · Version 1 · Published September 18, 2026 · AI-assisted educational synthesis; not an independently validated standard.
Learning outcome
Explain a connection selection using approved installation instructions and exposure conditions.
Start with exposure and compatibility
Connections join decking or cladding to a supporting system, not to an abstract material. Identify salt exposure, persistent wetting, treated framing, adjacent metals and drainage. Corrosion resistance depends on material and environment. A generic “exterior” label does not establish suitability for every coastal or chemical exposure.
Use the approved system
Read instructions for the exact fastener, board profile and substrate. Confirm diameter, length, embedment, spacing, edge distances and pilot-hole requirements from approved documentation. Dense hardwood may need predrilling, but do not invent a pilot-hole size. Hidden clips must be compatible with the groove and application; a deck clip is not automatically approved for cladding or an overhead ceiling.
Inspect the installation
Make a sample connection and check for splitting, crushed fibers, overdriving and proper engagement. Use the specified tools and torque guidance. Document product identifiers and representative installation photos. Escalate conflicting wood-supplier and fastener instructions before work proceeds. Do not assume mixing metals or adding a coating will resolve compatibility without manufacturer guidance.
Sources & scope
These references support the underlying principles; they do not approve a specific project or endorse EHCI.
- USDA Forest Products Laboratory — Wood Handbook (2021)
Reference chapters on species, moisture, fastenings, biodeterioration and finishing; not a project-specific specification.
- American Wood Council — DCA 6 residential deck guide
Based on the 2015 IRC, with limited species and applications. Check the locally adopted code; do not extrapolate tables to unlisted tropical hardwoods.