| Condition
at Head |
Maximum
Head Length between mechanical fixings |
| Head
Frame Un-Reinforced – Standard Fixing |
600mm |
| Head
Frame Aluminium Reinforced – Standard Fixing |
900mm |
| Head
Frame Un-Reinforced – Foam Fixing |
1700mm |
| Head
Frame Aluminium Re-inforced – Foam Fixing |
1800mm |
