Steel framed jump ramp

Mooseguts

Can anyone tell me "approximately" how much a steel framed jump ramp with a Mastercraft surface weighs? I am trying to determine how much flotation I need.

LeonL

Our surface is homemade, so possibly heavier than Master Craft. Our supposedly weighs just over 5,000 pounds. Be aware that unless the flotation you use completely submerged (you wouldn't want that) you don't get the full value of the given piece, so allow for that.

ntx

Welcome to the site @Mooseguts . that question is like asking how much for a new car?. The range is huge depending on several things. The first is what size is the steel. You can find the weight of 20 foot length of angle iron on line with google search. Next is the thickness of the deck under the mastercraft surface. Good luck

LeonL

Is this thing new? Does it not have flotation currently? What size are the flotation cradles? Fill all,the areas that are provided and add weight if too bouyant

BraceMaker

@LeonL of course if you aren't using the full floatation it will continue to sink until you are!

Easiest route is likely to start with something known like the IWSF jump plans. They detail utilizing "18 7" x 20" x 8' DOW DOCK BILLETS"

https://www.dow.com/en-us/products/STYROFOAMBrandBuoyancyBillets

Which is listed as 425 lbs of bouyant force - so your starting point is 7650 lbs bouyancy.

How much in excess of the weight of the jump surface do you need for it to be stable/firm is a good question - but I think that's probably a good place to start.