Whenever multiple lines are pulled simultaneously and equal tension and twist prevention matter, a headboard is required. Headboards (also known as “running boards”) are load-distribution and alignment devices placed between the pulling line and multiple conductors. They are mainly used in overhead transmission stringing but also in any multi-line pulling operation where balanced forces matter.
Selecting the right type of board is just as important as complete confidence in its performance under load.
That’s why we invited independent certification company DNV to witness and supervise the stress tests of our 2/3-bundle configuration headboard at our in-house tensile testing facility. The program included proof load, overload, and destructive breaking load tests on both central pulley and fixed points.
The mission: withstand a proof load of 94 kN and an overload of 140 kN without deformation or defects.
Result: passed without issue.
Then came the destructive test. The target breaking load was 280 kN. The headboard reached 349 kN before failure – and it wasn’t the board that gave way, but the rope.
A strong result that confirms the integrity and reliability of our equipment. Thanks to everyone involved in the testing and verification process!