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The safety factors all come from mine standards. The load is the max drawbar pull for a single D11T in first gear pulling at a specific angle with a specific grade of road and includes dynamic loading while accelerating. Safety factors will come in at the end. However, I'm conscious about...

The skid is dragging on the ground. All load calcs have been done for that. Please ignore how the load is being applied and rigged up, it's already all decided and signed off by a team of site engineers, so we have no say on that. Our area now is the skid with the given loads.

It needs two dozers to pull it out, one isn't enough. We can't use wire rope, site standards, strops are all we can use. The rigging plan for this is already done and not our area, our job is to build the platform.

We have a large 200 tonne catamaran-style dredge that we are planning to tow with a couple of D11 dozers up a hill. We are designing a platform that it will sit on and be lashed down to, and this is what the dozers will be attached to using towing strops. This platform will have a large welded...