Standards & Code Lookup

Use this page to know what kind of source controls the question. TinnerFlow does not reproduce paid standards or code books. It points you to what to verify and helps you ask the right question before touching the work.

What to Verify

Start with the approved drawings and specs. Then verify the exact standard, code, manufacturer instruction, and local amendment that applies to your job.

Duct ConstructionSMACNA StandardsUse for duct construction standards, reinforcement, pressure class, joints, supports, leakage, and related duct details. Verify the exact table in the official book or project spec. Mechanical CodeInternational Mechanical CodeUse for adopted mechanical-code requirements. Your city, county, state, and project specs may amend or supersede model-code language. Fire / SmokeNFPA 90AUse for air-conditioning and ventilating system fire/smoke topics. Always check adopted edition, rated assembly details, damper listing, and AHJ direction. VentilationASHRAE 62.1Use for ventilation and indoor-air-quality design references. Field installers should verify design airflow, outside air path, TAB notes, and engineer direction.

Red-Zone Question Builder

For rated assemblies, rigging, structural attachment, grease duct, controls, unknown utilities, and code/AHJ topics, do not ask “what do I do?” Ask with facts.

1. Name the Control Point

“The drawing shows ___, the field condition is ___, and I think the controlling detail might be ___.”

2. Ask the Exact Next Step

“Do you want me to hold, photo it, write an RFI note, call the detail out, or install it this way?”

3. Say What You Will Not Touch

“I am not cutting/drilling/moving this until the sleeve, support, clearance, rated wall, or manufacturer detail is verified.”

Common Lookup Paths

These are training prompts, not copied standards.

Life SafetyDamper & Rated Wall QuestionsStart here for access, sleeve, breakaway, label, firestop, and rated assembly checks. SupportsHanger & Support QuestionsStart here for all-thread, anchors, beam clamps, trapezes, and support conflicts. Exact ModelManufacturer LookupUse the exact submittal, install sheet, model number, and approved access clearance.