Girt Connection Details: How Φ12 Tie Rods Keep Wall Purlins Straight

Girt connection details are the small bolted/welded parts that tie wall girts together and prevent them from sagging or twisting under wind load. Below is data from an actual wall bracing connection detail.

Basic Specs

Connection Parts

The girt bracing system consists of:

• Vertical tie rods: Φ12 round bar, vertical, between girts
• Diagonal tie rods: Φ12 round bar, diagonal at corners/openings
• Spacer tubes: D32×2.5 tube over tie rod at column lines
• Angle connectors: L100×63×8 welded to girt web
• Stiffeners: -47×6 plates welded to angle

Advantages

1. Prevents girt sag — Φ12 tie rods stop long girts from deflecting vertically
2. Stops girt rotation — tie rods prevent girts from twisting in wind
3. Small parts, big effect — cheap rods and angles, huge stability gain
4. Bolted connection — field installable, no welding on site
5. Standard details — same connection works for all girt sizes

Disadvantages / Limitations

1. Hard to inspect behind cladding — once wall panel goes on, tie rods are hidden
2. Rust risk at ends — threaded rod ends can corrode if not galvanized
3. Adds material cost — rods, tubes and angles add up over long walls
4. Need correct spacing — too few rods means girts sag
5. Conflict with openings — tie rods must dodge windows and doors

Typical Applications

1. Industrial factory walls — bracing wall girts on long factory walls
2. Warehouse walls — tall warehouse walls need multiple rod lines
3. Curtain wall backing — stabilizing girts behind curtain wall
4. Cold storage panels — insulated panel wall girts
5. Metal building walls — pre-engineered metal building wall system

Installation Notes

• Tie rods threaded at ends, tighten with nut after girts aligned
• Spacer tube D32×2.5 slides over rod at column line
• Angle connector L100×63×8 shop-welded to girt web
• Diagonal rods installed at building corners and wall openings

​​​​​​​Wall girt bracing connection — Φ12 vertical and diagonal tie rods, D32×2.5 spacer tubes, L100×63×8 angle connectors, Q235B, keeping wall purlins straight and stable under wind load.

**WhatsApp**: +86‑13889862778, +86‑18242444407
**Email**: eddie@zdsteels.com, wells@zdsteels.com