Introduction

Greetings! I created this blog to provide information about various projects and to promote my book, Building a Small Cable Suspension Bridge with the Cable Locking System. I am also publishing a new book in 2018, Building a Wood-Frame Panelized Yurt. You can read book ordering information below. I have included several posts on this blog that are clips from the book as well as additional information, such as a fairly recent and complete price list.

If you have specific questions about your project, feel free to email me, but I’ll be honest: as stated in the book, I am not an engineer. I will not make specific recommendations for your particular bridge project. Bridge designs are all site-specific and all kinds of factors must be considered before installing a structure such as this one. But that said, I do like to share ideas and hear yours. I can be reached at marvinad.mad (at) gmail (dot) com. I don’t always answer very quickly, but I try to answer eventually.

Print
“It’s a beautiful little bridge and I’d be very proud of it if it were mine.” – Dr. Raymond Cook, Associate Professor of Civil Engineering: University of New Hampshire

Marvin Denmark, builder and craftsman with more than 45 years of experience, details the process he used to design and construct a small cable-suspension bridge. After giving a brief history of suspension bridges and engineering considerations, Denmark provides illustrations, diagrams, and full-color photos to explain the step-by-step process he used to complete the project.

Anyone who needs a footbridge that is relatively easy to build, without the use of heavy equipment or difficult-to- replace components, may benefit from the ideas in this book and by using the patented “cable locking system.”

This book is available for purchase on Amazon.com. Click Here to Order

Cable locking system components: While I hoped to provide parts for the cable locking system to individuals, the costs to manufacture and ship a small number of the components has made me conclude that it’s not worth it. The beauty of the system is that the parts can be manufactured easily. Just follow the specs in the book. Of course, please don’t go manufacturing and selling the system, because that would be a bit of a patent infringement. I’d be happy to sell the patent to anyone who is interested.

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6 thoughts on “Introduction

  1. I love your idea and simple instructions for building a suspension bridge. We are considering an 80 foot span here in Waterville Maine. We wonder if you have experimented with cable stay bridges instead of suspension??

    • Thanks for the compliment. In the A-shape design, cables are run from the deck up to a post or tower where they are secured. The load forces are primarily on the vertical posts and on the bridge deck. That’s a cable-stayed bridge. The post or posts would have to be in the middle for an 80-foot bridge. If the post was on the bank then half the bridge would be going over the land, not much point in that. The column can also be jeopardized by the rise of the creek, but an engineer could figure all that out for you.

      My goal was to stay dry while I built my bridge which I managed to do. I also preferred the M-style because I like the Golden Gate Bridge!

  2. Would like to purchase the cable locking system components but can not find how to do so on your web sit. Please advise

    • As mentioned in the blog about material costs, the shipping was too much for us to produce and sell the components, but all the information is there for your local fabricator to make what you need. Good luck!

  3. Just finished your book and thoroughly enjoyed it. The step by step descriptions have been helpful in thinking through a bridge of my own. I’m on your site hoping to find information on your next bridge (referenced in the book) so hope to find it here somewhere. Thanks a lot.

    • Thanks, Travis! My next bridge is still a pending project, but I can tell you right now what will change, which isn’t much. The cables will go straight across, at about 36″ above the deck. They will attach to four posts which are again supported with dead men. Cable stringers will meet up with 4×4 beams that will attach using the Cable Locking System.

      I will use the simpler version of the C.L.S. which I explain on a blog post from a few years ago: https://wildcatman.wordpress.com/2013/09/08/evolution-of-the-cls-and-an-alternative-plan/

      I like the look of the “Golden Gate” style suspension bridge, but also like the look of something simpler. Plus, the holding cables will also serve as handrails, something that is missing on the original design. Some people feel more confident with a hand rail.

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