I need to weld some ramps for a Porsche. Im guessing the car weighs about 3k lb.
The ramp needs to be 12' long and i plan on having the bottom half disconnect for storage. I was going to use c4x4.5 for the outside of the ramps. then support every 12" with L 3x3x1/4, and finally lay some 3lb or 4lb expanded sheet on top.
It will be 16" wide.
The other idea was to just buy an i beam with a 16" web and like a 6" flange. And trim the flange on the ends.
I prefer the first option.
Any input is welcome.
Thanks
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I recently made some motorcycle ramps for my parking shed. Similar principle, but different load rating obviously.
What I did was to use some angle iron for the outside rails, but pie cut them, bent a radius into them for a camber, then welded the pie cuts back up. Then I welded angle iron, corner up, on 4" centers for the driving surface. That allows the wheel to bit and never sit too low between the rails. A center angle rail lengthwise for mid-load support. My material was 1/4" 2x2 for sides and center, then 1.5x1.5 3/16" for driving rails. Whole thing is less than 10' and has a gentle slope to prevent bottoming out or scraping.
For your Porsche, the drive-on angle needs to be pretty flat to prevent the front lip from dragging. A transition with a camber helps level the vehicle out as you drive over/past.
What I did was to use some angle iron for the outside rails, but pie cut them, bent a radius into them for a camber, then welded the pie cuts back up. Then I welded angle iron, corner up, on 4" centers for the driving surface. That allows the wheel to bit and never sit too low between the rails. A center angle rail lengthwise for mid-load support. My material was 1/4" 2x2 for sides and center, then 1.5x1.5 3/16" for driving rails. Whole thing is less than 10' and has a gentle slope to prevent bottoming out or scraping.
For your Porsche, the drive-on angle needs to be pretty flat to prevent the front lip from dragging. A transition with a camber helps level the vehicle out as you drive over/past.