Heavy Duty (HD) Chassis with new HD mast allows using Mast Climbing Work Platforms up to 30 meters height freestanding. Not only that but using the Chassis with outriggers, the mast climber can be used up to 55 meters height with only attaching the top anchor with a mast. When it comes to compatibility, the HD chassis can be used with the whole range of Mast Climbing Work Platforms i.e. SC5000, SC6000, SC8000 and SC10000.