A very strong and safe ladder hook that is CNC machined from a solid block of 7075-T6 to produce a hook that breaks at over 17kN in tests.

 

We designed the ladder hook to address two main issues apart from strength:

 

Rollout: The hook has a deep profile and a carefully calculated connection hole that together mean that the ladder hook will remain securely on the ladder rung and won’t roll off even if the user leans outwards. It works well on rungs from 11.5 to 13.5mm and this covers all the brands we use and recommend. 

Optimising Ladder Rung Strength: The ladder hook is much stronger than the actual ladder rung and the actual breaking strength of the system will actually depend on where and how the ladder rung is loaded – our hook is designed to spread the load as widely as possible and also has chamfered radiuses on the edges so that if the load is not applied uniformly there are no square edges to bite into the rung and initiate a failure

 

In addition the ladder hook is applied with two means to enable a fast, hands-free placement; firstly it is supplied with a rubber grommet for the connecting hole that allows it to be angled on the chest harness carabiner and secondly it has a small hole to allow a bit of cord to be attached so the hook can be manoeuvred by the mouth.

 

The hooks and grommet work well with the DMM PerfectO locking carbiners.