TinnerFlow logoTinnerFlow™
Apprentice answer

What's the rule of thumb for how far the all-thread should stick out below the unistrut nut

1st YearHangers, Supports & AnchorsCheck first

The rod should pass entirely through the nut with a minimum of 2 to 3 full thread pitches exposed below the bottom locking nut. Do not leave 6 inches of excess rod hanging down to poke holes or scrape workers' heads.

Ask a jobsite questionBack to Hangers, Supports & Anchors

Plain-English answer

The rod should pass entirely through the nut with a minimum of 2 to 3 full thread pitches exposed below the bottom locking nut. Do not leave 6 inches of excess rod hanging down to poke holes or scrape workers' heads.

Field checklist

Ask Foreman

Hey boss, I’m checking hangers & supports: What's the rule of thumb for how far the all-thread should stick out below the unistrut nut? I found the likely issue and want to verify the next step before I lock it in. Do you want me to adjust it now or check the drawing/detail first?

Verify before acting

Use this as training guidance. The foreman, approved drawings, project specs, manufacturer installation instructions, employer safety policy, and AHJ/code requirements always control the final answer.

Related questions in this category

How do I square up my hanger points off a structural I-beam?1st YearHow do I support a massive 90-degree elbow so it doesn't sag on the heel?1st YearWhen building a unistrut trapeze, should the strut open face point up or down?1st YearWhen do I need to use isolation pads on my duct hangers?1st YearHow do I use a laser level to establish a perfectly straight hanger line?1st YearHow do I hang spiral duct using cable hangers (Gripple) instead of strap?1st Year