Angie graduated from Indiana State University with a Bachelor of Science in Interior Design. Prior to joining the FBi team, Angie was a kitchen and bath sales consultant in Lafayette, IN. In 2012, she started with FBi as the Inside Sales/Marketing Assistant. Today she holds the role of Sr. Marketing and Inside Sales Manager. Angie grew up in a farming community and has always enjoyed helping her family on the farm. A past 10-year 4-H Member, her passion for livestock pursued her to take a career in the agriculture field. She and her husband live in Northwest Indiana with their two daughters. In her free time, she enjoys outdoor leisure activities and spending time with friends and family.
Lateral loads act in a direction parallel to the ground (e.g., earthquakes and high winds). These forces can work in any direction. Therefore, the pole barn must be designed to withstand loads, both parallel and perpendicular to any wall.
All structural loads must be able to pass from the areas in which the load is applied. This transfer of forces through the post frame structure is called the load path. A continuous load path transfers all vertical and lateral loads from one building component to another until they reach the ground.
If the load path flows continuously without interruption, there will be no structural damage. However, one break in the course can cause significant damage.
One “weak link” is all it takes to compromise the structural integrity of your pole barn. Therefore, each building component must be strong enough to carry out these anticipated design loads.
While the building system consists of multiple parts, we detail specific areas affected by pole barn height.
Columns also referred to as posts, are integral parts of a post frame building. They support the entire roof system and transfer all vertical loads to the footings. In addition, posts are the backbone of your walls and assist in resisting horizontal loads.
The term “laminated column” refers to two or more layers of dimensional lumber that has been mechanically laminated with nails. These posts are made from 2x6 or 2x8 lumber.
In taller buildings, you can upgrade the columns to 2x12 lumber. Or, you can use engineered wood, such as Parallam® PSL Columns.
This manufacturing process uses veneer strands, which allow for higher load capacity. Because it’s made with conjoined veneers, Parallam is available in specialty lengths that exceed conventional lumber.
If engineered wood is incompatible with your building design, you can opt for a hybrid system. This approach consists of steel columns and wood trusses. It’s used in pole barns where engineered lumber isn’t a viable option.
Please note that “over-sized” columns won’t necessarily make your post frame building stronger. Why? Because the diaphragm carries the majority of wind loads.
In post frame construction, buildings can resist extreme lateral loads through the diaphragm design.
As building height increases, so does the need for a structural diaphragm.
The term “wind load” refers to the internal and external wind pressure placed on a structure, which is measured in pounds per square foot (psf). Engineers use wind loads to determine which building materials will withstand Mother Nature’s curveballs.
The design load is based on wind speed and building codes obtained from the American Society of Civil Engineers Standard (ASCE 7-10). This publication helps engineers determine load requirements essential to their practice.
Wind speed increases with height above ground. Consequently, taller pole barns are exposed to greater pressures.
Furthermore, engineers account for the following influential factors when calculating your post frame building’s wind load:
Basic wind speed
Gaps and leaks
Regardless of pole barn height, wind load is a critical aspect of the building design.
3) How do certain building features affect pole barn height?
As you mull over possible building heights, don’t forget to factor in your desired features.
For instance, you’d like to have an 18’ overhead door for quick and easy access to your farm shop. Typically, 2’ is added for sufficient building clearance.
If you prefer a wider opening or full building clearance, then a sliding door will work best for your operation. This dooring option will allow you to have an approximate 18’ opening with an 18’ eave.
Another building feature that influences pole barn height is porches, which are used to shelter people from the elements as they access the structure via a walk door.
Porches are also a comfortable place to sit and enjoy the outdoors. On a lazy evening, you can sit in a wooden rocking chair with a cold glass of sweet tea and watch your children (or grandchildren) ride ATVs around the yard.
For a “cozy” aesthetic, your porch shouldn’t be too tall. 7’ to 8’ of building clearance is ideal. You may have to adjust your pole barn height accordingly.
Are you interested in adding a lean-to? Please note that the door size on the end-wall or side-wall will affect the height of the lean-to and post frame building.
All buildings are assigned a construction type, which determines the building components’ level of fire resistance.
At FBi Buildings, our standard building is a Type 5B. This classification means our pole barns are constructed with any materials permitted by the code.
Unsurprisingly, the other factor is building use. The code uses occupancy groups to determine the allowable height. There are ten categories: A, B, E, F, H, I, M, R, S, and U. For example, a horse barn would fall under the Group U occupancy.
Using these two variables, you can determine the allowable height by following the corresponding code tables.
Customarily, Type 5B construction is limited to one story. However, the code does provide some considerations that allow us to gain an extra story.
In these situations, we recommend working with a post frame builder and their in-house engineers. They work closely with salespeople and outside parties to meet design requirements and customers’ needs/wants.
How Tall Will Your Pole Barn Be?
While we can’t tell you how tall to make your post frame building, we can provide solid talking points to discuss with your professional builder and their team.
Do you already have a certain height in mind? Visualize your future post frame building with our 3D design tool. Save, print, or email your final plan to family and friends.
Are you ready for a quote? Share your design with us, and a member of our sales team will give you a call to begin the estimating process.
We also recommend that you check out The Ultimate Guide to Building a Pole Barn. This guide will help you navigate the steps you need to take before and during construction to insure your project gets done on time and under budget.