Why Geographic Location is So Important in Truss Design

wood trusses

Geographic location is an important factor for truss design. Depending on your geographic location, your trusses will have to account for different amounts of wind and snow.

Timberlake TrussWorks has customers all across Oklahoma, Texas, and Kansas. That means we have lots of different climates and codes we need to consider.

When a customer orders trusses, we can’t proceed without knowing their geographic location. By analyzing the weather patterns and climate history in this geographic location, we can get accurate information about wind and snow loads in the area.

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Consider Attic Uses When Designing Home Trusses

wood trusses in OklahomaFraming your home with trusses comes with some key advantages. Trusses tend to be cheaper and stronger than traditional framing methods.

But trusses have one more advantage: they’re also perfect for creating functional attics.

The attic is the natural area contained within the trusses and below the roof. When designing trusses, you need to consider future use of your attic space so you can design trusses accordingly.

Top 10 Uses for Attics

An attic is the space between the roof and the ceiling of your house. Many people leave attic space unused. However, the structural part of the roof can be modified in a cost-effective and inexpensive way to add valuable square footage to your home or business in the form of a useable attic area.

Here are some of the most common uses for attics:

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How Much Do Trusses Cost? – An Approximate Guide

Roof truss framing is a cost-effective way to build a roof. Today, more and more homebuilders use roof truss framing to save costs and build stronger roofs.

But how much do trusses cost? Today, we’re going to explain how pricing is evaluated and calculated by truss manufacturers and what you can expect when you consider purchasing a truss system for your next project.

An average 2,600 square foot house costs…

According to the study discussed below, we can give you some approximate pricing information for truss framing. These are general figures and will change according to whichever supplier you’re working with:

-Labor costs: 112 man-hours x $20/hour average = $2,240

-Equipment costs: Crane = $500

-Total bd. ft. lumber: 10,500 x truss manufacturer’s selling price per board foot:  $9,000 to $12,000

-Scrap disposal cost: 3 yards of lumber x $15/yard plus labor costs: $77

Total cost:  $11,817 to $14,817

Keep in mind that these statistics are for a 2,600 square foot house. Also, these are only approximate values. Labor, equipment and materials vary in price due to cost of living in varying locations. Since cost of living is much lower here in Oklahoma and the Midwest, these prices will be lower than the national average.

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How Prairie Winds Affect Wood Trusses in Kansas

Storm Clouds SaskatchewanKansas is notorious for its prairie winds. Engineers have always had to take these winds into account when designing structures across the state.

Prairie winds can be downright dangerous if you’re working with the wrong building materials.

Every day, truss designers need to take a variety of factors into account when building for the prairie winds in Kansas. Here are some important things to know about how truss systems are affected by Kansas prairie winds:

Truss builders need to calculate wind pressures using two blended methods

There are two broad ways to calculate wind pressures: Main Wind Force Resisting System (MWFRS) and Components & Cladding (C&C).

MWFRS applies to a structural frame or an assembly of structural elements that work together to transfer wind loads to the ground.

C&C applies to components that directly receive wind loads – like wall coverings, roof coverings, fasteners, and girts. Components and Cladding are typically exposed to higher wind pressures than MWFRS elements.

Trusses fall into both categories. Thus, the industry-standard practice is to design the truss to handle both MWFRS loads and C&C loads.

Truss builders need to consult wind maps to identify correct wind speeds

Building codes typically require the use of a 90-mph wind speed for inland areas of the United States. However, you’ll need to consult local wind maps and government building codes for region-specific information.

Experienced builders don’t settle with just the 90-mph wind speed standard. Experienced builders increase the durability to handle wind speeds around 100 and 110 mph. With wood trusses in Kansas, increases wind speed durability is a major consideration. All trusses must be designed to withstand substantial wind, more than the average structure.

Building usage affects wind pressure calculations

Buildings fall into a number of different usage categories. Specifically, there are three broad categories of building usages:

-Category I: A building that will have a low hazard to human life if it fails

-Category II: A building that presents a substantial hazard to human life if it fails

-Category III and IV: Buildings that are critical facilities or present a substantial hazard to human life in the event of a failure.

Different building exposures affect truss design

Buildings located on empty, flat land are more affected by wind pressure than buildings surrounded by trees and other buildings.

Building codes classify these buildings in four different ways:

Exposure A: Buildings located in downtown areas or city centers.

Exposure B: Urban and suburban buildings that are surrounded by similar-sized buildings and trees.

Exposure C: Buildings in an open area with scattered obstructions.

Exposure D: A building exposed to unobstructed wind for at least one mile over flat land.

Good truss builders take all of these factors into account

Ultimately, truss builders have a lot of responsibility. In Kansas, flat plains let wind travel unobstructed for hundreds of miles. Rural buildings and even many suburban buildings are rarely protected against substantial wind.

To take truss manufacturing to the next level, Timberlake TrussWorks builds wood trusses capable of withstanding strong winds. The key to a sound structure requires the builder to guarantee trusses are fastened tightly against the wall. This is accomplished by installing TimberLOK Screws, which we happily provide.

These screws are hurricane ties – able to withstand the brunt force of harsh winds caused by severe storms. TimberLOK Screws keep trusses and roofs stable and secure during harsh weather conditions experienced on the plains of Kansas.

If you’re shopping for wood trusses in Kansas, then you can’t settle for average. Kansas’s prairie winds chew up average wood trusses and quickly reduce the lifespan of structures. If you’re looking for wood trusses in Kansas that offer a higher level of quality and longer-lasting support, then order from Timberlake TrussWorks today.

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