Hi,
I have to build a new boat launching trolley for my 26 foot bilge keel sailing cruiser, weight 3 tons. The existing trolley, 7ftx7ft is built using channel section each side to take the keels and has two axles 80x80. It is non steerable and is on 14inch wheels and stub axles. It has now rotted out and I want to build a replacement with steerable front axle. I have the hubs and need to make this transportable in sections. My idea is to use 100x50 4mm box section for axles and for the keel carrying longitudinal sections, these being 2 x 7ft sections welded side by side across the 100mm side with upright 100x50 welded on section supporting. These longitudinal sections to be bolted to the axle sections to make up the 7ft x 7ft trolley. On top of the longitudinal sections I am welding on 3mm plate with 50x50 angle around the perimeter to contain the keels which are themselves just under 7ft long. There will therefore be no point load on these sections other than where they locate on the cross beam axle sections. Any ideas whether these section sizes are adequate?
Many thanks.
I have to build a new boat launching trolley for my 26 foot bilge keel sailing cruiser, weight 3 tons. The existing trolley, 7ftx7ft is built using channel section each side to take the keels and has two axles 80x80. It is non steerable and is on 14inch wheels and stub axles. It has now rotted out and I want to build a replacement with steerable front axle. I have the hubs and need to make this transportable in sections. My idea is to use 100x50 4mm box section for axles and for the keel carrying longitudinal sections, these being 2 x 7ft sections welded side by side across the 100mm side with upright 100x50 welded on section supporting. These longitudinal sections to be bolted to the axle sections to make up the 7ft x 7ft trolley. On top of the longitudinal sections I am welding on 3mm plate with 50x50 angle around the perimeter to contain the keels which are themselves just under 7ft long. There will therefore be no point load on these sections other than where they locate on the cross beam axle sections. Any ideas whether these section sizes are adequate?
Many thanks.