Animal Barn - Part 8; Building 20' Gambrel Roof Rafters by Hand
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- Опубліковано 10 жов 2024
- Animal Barn - 20' x 30' post frame style gambrel roof barn with attic/loft. Building 20' Gambrel Roof Rafters by Hand using a jig layout. #gambrelroof #animalbarn #postframebarn #gambrelrafters #barn
Looks like you got some good help to go with your good plan.
Well done and no stupid dramatic bass music in the video, thumbs up.
Love this video! I’m working on my own 16x22 barn and wanted to make rafters instead of using trusses for increased head room. Yours turned out lovely. I hope you post a follow up of the finished barn and interior!
If you are looking to build gambrel rafters, check out my response/comments to Mss PGJ. I discussed the resources used in designing my gambrel rafters and a website I found for laying out the rafters and gusset plates.
@@HybridHomesteaders Thank you, yes I saw that too! I've got a few of those bookmarked already as well. Your comment was very helpful. I am still curious to see your finished barn!
How did you like that glue? I have done a 19' wide for a shed and will be doing a 20' for a cabin shortly. I used cheap glue last time and wasn't happy with it.
I would definitely use the Great Stuff polyurethane foam adhesive again. In fact, I am building a second barn on the property and used this glue again for the subfloor and gusset plates on rafters. There are obviously other polyurethane foam adhesives on the market, I just went with Great Stuff. Before I purchased this glue initially, I came across Matt Risinger’s video on UA-cam comparing non-polyurethane adhesive to polyurethane adhesive. The video shows the strength of the polyurethane foam adhesive. Check out the link here-
m.ua-cam.com/video/e-llYEut3Wc/v-deo.html
Am planning a 12' x 20' gambrel roof barn/shed in UP of Michigan. Would like to build smallish roof rake on each side to throw rain/snow away from side. Your thoughts on best (read simplest) way to build these side roof rakes into my plan?
For my gambrel roof design, I used blocklayer.com and used their gambrel roof calculator. I was able to play around with the different pitch angles, height, wood thickness, etc.
I went with a 24/12 lower pitch and 4/12 upper pitch. Had I not been working within an overall height limit on my barn, I may have gone with a 6/12 upper pitch. When researching my roof design, I came across a few forums/opinions that felt the 24/12 lower and 6/12 upper was an aesthetically appealing design. Obviously, other factors may come into play and I am really happy with my roof design/look. The gambrel roof offers so much extra storage space upstairs. I chose to hand build my rafters, as opposed to buying pre-built gambrel trusses. I wanted the entire floor area upstairs to be open from side to side, without any interior 2x4 webbing that is found on pre-built trusses.
Not sure if that answers your question, but that is the background on my gambrel roof design.
Quick Question: How long did this take you to completely build? Also, approximate cost? I'm pricing out my own barn build right now. Thanks so much! Great job from another Michigander!
The overall project took about 8 months, but that also included outfitting the interior with a goat stall and a chicken coop, and adding a chicken run off the back of the barn. My wife and I framed out the barn, and my dad helped with the steel roof and walls. We worked on the barn during any available evenings and weekends. As for the cost, you should be able to build a similar barn for about 18k, depending on materials used. The floor of the barn is dirt, since we have farm animals, so I didn't have the cost of a concrete floor. I also chose to build the rafters by hand, which I believe cost less than buying pre-built gambrel trusses. The cost savings was nice, but not the main reason for building them myself. I wanted the entire floor area upstairs to be usable from side to side without any interior 2x4 webbing that is found on pre-built trusses. If I bought trusses, the webbing would've confined my upstairs space to 12' wide by 7' or 8' tall. Even though I lose some head space near the edges with my current design where the roof slopes down, I am still able to store stuff in that space.
Not sure if you are planning to build a gambrel style roof, but if you want some more info on the design, I can pass along the resources I used. I am actually working on my second barn right now, same design just 18' longer. I still plan to upload additional videos showing the complete build. Good luck on your barn build.
@@HybridHomesteaders I would love any resources you have. I am near the Grand Rapids area. Thank you so much!
When doing some research on building my own rafters, I came across a couple good sources of information. One of the sources was barnplans.com, which has a lot of good photos of barns, design plans you can purchase, and offers ideas you can incorporate into any barn build planning stages. When picking out plans, you can add on dormer windows, cupolas, etc. The part I was really interested in was the engineered plans for building gambrel rafters. Although these plans may work for most peoples applications, and come with an engineered stamp of approval, I still wasn't loving the design for my 20' wide barn. I wanted something that was more customizable, such as altering pitch angles. These trusses still had extra webbing that protruded down into the head space. I wanted a more simple overall design that was customizable. At this time, I was still on the hunt and reading through lots of forums across the internet trying to learn of any other design ideas. I will say, this website does have a lot of great info and lays everything out for most peoples applications and is a one stop shop. The owner of the website and barn designer, Dano, built his own home using the tools on his site and walks you through the entire process with lots of photos and details.
The second resource I came across was a couple articles on gambrel designs written by architect and builder Andrew DiGiammo. The articles are located at jlconline.com and can be downloaded for free. The first article titled Design: Making Gambrels Work, www.jlconline.com/projects/design-making-gambrels-work_o. The second article titled Design: Gambrel Roof Structures and Wind Uplift, www.jlconline.com/projects/design-gambrel-roof-structures-and-wind-uplift_o. Both articles have free downloadable pdf versions. I liked how the articles gave background on gambrel designs and provided advantages of a full-span rigid frame system, which I ultimately used. The design was very basic and customizable, using the gusset plate system. The design looked very sleek and clean, yet worked. The architect/builder even utilized this design in his own home as well.
I should mention, I also came across another site called design.medeek.com. The gambrel design tools on this site are geared towards a typical truss system that utilizes interior webbing and confines the upstairs inside a box. Although I wasn't interested in this design, I still found it interesting to compare the typical truss design with webbing vs an open clear-span hand-built rafter system. The owner/designer behind this site did have a client at one point who was wanting an open clear-span rafter system that utilized gusset plates as opposed to trusses with webbing, according to a forum I came across, but it sounded like the project never made it to completion. If you google medeek gambrel roof, I believe he did a gambrel roof study as well. Just additional info, if you want more articles to read on gambrel roofs.
Now that I knew what design and overall look I wanted, I was still scanning for some resources/tools to visually create my gambrel roof with different pitches, wood size, etc. I figured worst case scenario, I would do some of my own math to figure out which pitch angles I wanted and how that would affect the overall height of my barn, but I ended up coming across another website called blocklayer.com. I used the gambrel roof calculator tool on the site. This connected the dots for me and allowed me to utilize the design I wanted, along with customizing pitch angles, wood sizes, etc. and visually seeing how each modification changed the overall design specs. The site gives you rafter and gusset plate dimensions for creating a template you can utilize when cutting out the rafters and gusset plates. When cutting out my gusset plates, I modified the bottoms to follow the contour of the rafter, rather than flat across the bottom, as this site designed them. I didn't mind doing this modification, since Andrew DiGiammo designed his gusset plates this way.
Hope this helps and you enjoy the info on gambrel roofs. Also, I was able to build stairs to code going to my upstairs. I'm not certain, but I thought it was going to be a little tight trying to add stairs in a typical truss system that's 20' wide and restricting pitch angles and webbing. Either way, I wanted stairs and my design allowed me to build the stairs to code.
@@HybridHomesteaders WOW!! Thanks for all the help. Blocklayer is tons of fun! The article from jlconline was very informative. I'm with you.. I don't like the 'squared off gussets either. Do you need an engineer to sign off on the roof design? Thank you so much for taking the time to direct me.
@@msspgj My building department didn’t have an issue with the rafter design. Although they did request I add a collar tie to code, which required a collar tie on every other rafter. I would argue the collar ties aren’t needed, but I added them to pass inspection. If they gave me pushback on the design, I would’ve contacted a local structural engineer to review and sign off. I was willing to spend a couple bucks to get them approved, but nothing crazy. A local builder had told me they knew an engineer that would sing off on this type of thing for a couple hundred bucks or something like that.