How to Determine Required Capacity of Trailer Ramp Torsion Spring
Updated 07/26/2017 | Published 07/25/2017
Question:
Inquiry about part #CB250D96SHD. I have a ramp door that TOTAL weight of ramp door is 260 lbs. It is hung on 5 hinges, which should take half the weight off the door, if my thinking is correct. Will this spring lift this door, and how long are the cables that come with this unit? Thank you.
asked by: Brian K
Expert Reply:
On a hinged trailer ramp the hinges will carry a varying portion of the ramp weight depending on the ramp's position. When fully opened/extended the torsion spring will actually be holding more of the ramp's weight that when it is almost fully raised. In the fully vertical position more of the ramp weight is on the hinges since the ramp will be more directly over them.
The M-3 Enclosed Trailer Ramp Spring # CB250D96SHD can lift 250-lbs of ramp weight. You can use a scale to weigh your ramp if necessary. With the ramp installed on the hinges lower it fully until it contacts the scale. That is the weight the spring needs to be able to handle.
My technical contact confirmed each cable is 150-inches long.
The installation instructions for this product are recommended for individuals who have experience winding torsion springs. If you have not worked with a torsion spring system before, we recommend contacting a local garage door company to install this system.
Product Page this Question was Asked From
Conventional Ramp Door Spring for 8' Wide Enclosed Trailer - Dual Spring - 250-lb Capacity
- Trailer Ramp Springs
- Dual Ramp Spring
- Torsion Spring
- 150 Inch Cable
- 231 - 250 lbs
- Conventional Spring
- 6 Foot Wide Trailer
- 7 Foot Wide Trailer
- 8 Foot Wide Trailer
- 94 Inch Wide Spring
- M-3 and Associates
more information >
Featured Help Information
Miscellaneous Media
Continue Researching
- Search Results: trailer ramp springs
- Shop: Conventional Ramp Door Spring for 6' Wide Enclosed Trailer - Single Spring - 120-lb Capacity
- Video: Review of Gen-Y Hitch A-Frame Trailer Coupler - Black A Frame Mount With SnapLatch - GY67JV
- Q&A: How to Calculate the Weight of the Ramp to Make Sure Door Spring is Correct
- Q&A: Can Cable be Ran on Top for the Conventional Ramp Door Spring?
- Shop: Conventional Ramp Door Spring for 5' Wide Enclosed Trailer - Single Spring - 85-lb Capacity
- Shop: Conventional Ramp Door Spring for 8' Wide Enclosed Trailer - Dual Spring - 250-lb Capacity
- Video: What to Know About the Conventional Ramp Door Spring for 6' Wide Enclosed Trailer
- Search Results: motion light
- Search Results: step light
- Search Results: light strip
- Search Results: 20 000 lb hitch
- Search Results: demco coupler
- Search Results: motion sensor light
- Shop: Conventional Ramp Door Spring for 7' Wide Enclosed Trailer - Dual Spring - 160-lb Capacity
- Shop: Conventional Ramp Door Spring for 8' Wide Enclosed Trailer - Dual Spring - 230-lb Capacity
- Video: How to Install the M-3 Conventional Ramp Door Spring - Enclosed Trailer
- Shop: Conventional Ramp Door Spring for 8' Wide Enclosed Trailer - Dual Spring - 150-lb Capacity
- Shop: Demco A-Frame Trailer Coupler w/ Jack Hole - eZ-Latch - 2-5/16" Ball - Raw - Weld-On - 18K
- Q&A: Ramp Door Spring for a 200 Pound 8 Foot by 8 Foot Toy Hauler Ramp Door
- Video: Review of M-3 and Associates Trailer Ramp Springs - Dual Spring Ramp Door Spring - M386FR
- Q&A: Choosing/Sizing the Correct Trailer Ramp Spring for a Ramp Door
- Q&A: How Do the Heavy Duty Ramp Springs Install on a Trailer and Ramp
- Video: Built for Stability: Lippert Explains Their Solution For Safer RV Entry
- Video: Review of Lippert RV Steps - Motion Activated Light Strip - LC99JX
- Video: An In-Depth Look at the Access LED Light Strip for Truck Beds
- Shop: Brake Controller
- Shop: Trailer Wiring
- Shop: Lift Assist
- Q&A: Measuring Enclosed Trailer Ramp Door Weight For Torsion Spring Lift Assist
on Trailer Door Parts
