Bookshelf girts are a framing technique used in pole barn construction where horizontal members (girts) are installed flush with the exterior of the posts rather than simply nailed to the face.

The main advantages of bookshelf girts are:

• Increased structural integrity
• Stronger connection than face-nailed girts
• Better insulation opportunities
• Easier interior finishing
• More professional appearance

Metal Roof Purlins

Metal roof purlins, such as Z or C purlins, are used in post-frame construction for their strength and durability, providing robust structural support for roofing systems. Their lightweight design simplifies installation while maintaining high load-bearing capacity, ideal for spanning wide distances. Z and C shapes allow for easy connection to posts and trusses, ensuring stability and efficient load distribution. Additionally, their resistance to rot, insects, and fire makes them a low-maintenance, long-lasting choice compared to wood.

1. Ventilation: Perforated soffits allow air to flow into the attic or roof space, preventing heat buildup and reducing moisture that could lead to mold or rot.
2. Protection: Soffits shield the underside of the roof and the top of the walls from weather exposure—rain, wind, or snow.
3. Pest Control: An open overhang invites birds, bats, wasps, or rodents to nest or enter. A soffit seals that gap, keeping critters out of your barn’s roof space or interior.
4. Aesthetics: Soffits give a cleaner, finished look, hiding the structural bits like beams or trusses that might otherwise be visible.

Roof pitch refers to the steepness or slope of a roof, expressed as a ratio of vertical rise to horizontal run (e.g., 4/12 means the roof rises 4 inches for every 12 inches of run). Common pitches range from 3/12 to 12/12.

Lower Pitches (3/12–6/12)

These shallower slopes are more economical and easier to construct. They offer a lower profile, which can reduce wind resistance and material costs. However, they shed snow and rain more slowly.

Moderate to High Pitches (7/12–12/12)

Steeper roofs improve drainage and shed snow more efficiently. They also allow for additional overhead clearance or attic space and can create a more traditional or dramatic look. However, they typically require more materials and labor, increasing the overall cost.

Why Pitch Matters:

Choosing the right roof pitch affects not only the look of the building but also its performance and cost. A higher pitch may be preferable for areas with harsh weather or for customers wanting a more prominent visual appearance, while a lower pitch is often more practical and budget-friendly.

1. Ventilation: Perforated soffits allow air to flow into the attic or roof space, preventing heat buildup and reducing moisture that could lead to mold or rot.
2. Protection: Soffits shield the underside of the roof and the top of the walls from weather exposure—rain, wind, or snow.
3. Pest Control: An open overhang invites birds, bats, wasps, or rodents to nest or enter. A soffit seals that gap, keeping critters out of your barn’s roof space or interior.
4. Aesthetics: Soffits give a cleaner, finished look, hiding the structural bits like beams or trusses that might otherwise be visible.

Standard Barn

Barn With Roof Overhang

Open barn with two gable end walls and one sidewall

Open barn with closed gable

Open barn with one closed gable and one gable end wall