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20×24 Heavy Timber Outbuilding

20x24 King Post Timber Frame Perspective

Are you looking for a two-bay garage, guest house or spacious workshop?   Check out this 20×24 heavy timber outbuilding plan!   With plates over nine feet high, and with a 6 in 12 pitch the ridge stands at well over 13 feet for a volume ceiling. However, we include roof pitch drawings from 3 in 12 all the way to 12 in 12, so you can choose the volume you like!

The king post trusses and the knee braces are all enhanced with a graceful curve. The spline joinery in the beams and the scarf joints in the plates make this a challenging project you will be proud of. This building is super strong thanks to the heavy timbers used in the posts and trusses.

Depending on the roof pitch you choose, there is enough headroom to add a floor over part of the space for a crawl in sleeping loft or storage. Of course, you may also omit the loft and enjoy the volume the high ceilings add to the space.

The drawings consist of 32 sheets, in instant-download PDF format. They include all the piece and joinery details you will need to build this frame. The drawings also include renderings, plan, elevations, and sections. We include a timber list and fastener schedule to expedite finding and purchasing your materials. There are also 3D drawings so you can visualize the project. The plan set is formatted in 8 ½” x 11” for easy printing at home or your local copy shop.

Download Sample Plans

Check this plan out in our shop – 20×24 King Post Timber Frame (SKU 16266)

Important Information:

Timber Frame HQ provides plans for construction purposes but does not oversee the construction. The plan purchaser is responsible for assuring the plan meets local codes and regulations. It is the responsibility of the plan purchaser to obtain any and all structural analysis, engineering and specifications that may be required in the municipality in which it is to be built. Plan purchaser is to verify all lot conditions and measurements before construction. Purchaser is responsible for additional expenses incurred in order to meet local code and engineering requirements.

Customer understands that the following conditions in your specific area may require additional engineering:

  1. Wind / hurricane / tornado
  2. Seismic / earthquake
  3. Heavy snow
  4. Flood potential
  5. Soil instability
  6. Timber Frame Engineering

Customer understands that HVAC, Plumbing & Electrical will not be included in all plans.
Purchaser agrees that the use of the plan is for the construction of one house or frame only*, and that the plan or any part of it will not be reproduced by any means without the written consent of the copyright owner.

16 thoughts on “20×24 Heavy Timber Outbuilding”

  1. I live in mid-Missouri. Tornadoes are the worst physical event for us. Wind is the greatest risk. Will SIPs help with stability?

    Understanding that plan users are infinitely variable in their application and implementation of this frame, what is a reasonable estimate for what is entailed for just the timbers involved?

    I will cut and erect myself. Probably on a poured concrete foundation and floor, with under floor plumbing access and safe room. SIP walls and roof with metal skin on roof. 9/12 pitch.

    Spacious floorplan with guest bedrooms and a full bath on second floor for visitors and grandkids.

    If I like it I will build two. I have three daughters. Some separation is good 🙂

    1. Brice Cochran

      Yes, SIPs will help out a great deal, talk to your SIP company about the fastener schedule, adding more screws will be a big help. If you are working full time by yourself and are reasonably efficient with material handling I would give yourself 3 months if not 4. Can it be done faster, yes, but I tend to be conservative with time estimates?

  2. Hi – can I ask why there is a scarf joint above the brace rather than the main post?

    I would be interested in this plan if the roof pitch allows for a loft (bedroom)


    1. Brice Cochran

      It is better for the scarf joint not to be above a post. Here is why between the posts the unsupported timber will sag or deflect. Over the center post, the timber will crown.
      This causes this “exaggerated” wave shape effect in the timber. At the point where the sag or deflection changes to a crown is called the point of “inflection”.
      This point is where the timber is neither sagging nor crowning. It has the least amount of both forces, that happens to be over the brace.
      The plans come with all the roof pitch drawings from 3/12 to 12/12 and adding a loft is as easy adding to loft timbers. Let us know we can help sort out the loft.

  3. Richard Offermann

    Does the plan show the snow load in the specs? The county planning office won’t issue a permit without this information

  4. Richard Offermann

    Hey Brice,

    I’m looking at this plan for a shop. I can add another bent to get the length I need but county planning calls for a minimum of a 56lb snow load. I will be using yellow and ponderosa pine milled from my lot and I’m thinking of the 6/12 pitch to shorten the length of the rafters (and the size of the timbers I will need to source).

    That being said I would also need the snow loads in writing to satisfy the planning people.

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