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Historically, people have turned to wood for construction because it is a familiar material that is “user-friendly”. Pole Barns and wooden structures are some of the most common building structures around. A century ago, wood was easily the best choice for materials and was found in abundance all over the world. It was inexpensive, readily available and owners usually designed and built their own structures because it provided a flexible and very forgiving erection process.

Despite the initial savings in price, over the years, steel construction has become more popular and presents significant advantages over wood. Pre-engineered steel buildings are now the method of choice for most commercial, industrial and warehouse applications. Even the agricultural and livestock sector, which traditionally has relied heavily on wood for construction, is switching to steel.

Here are some of the reasons why steel structures have become the preferred alternative to wood construction.

Comparing Pre-Engineered Metal Buildings to Structures Made from Wood

Greater Structural Strength and Integrity

Steel building components are manufactured to very rigid standards and specifications. There are no seconds or substandard materials in a pre-engineered metal building. Each part in a metal building meets strict industry standards in terms of strength; and is designed specifically for its pre-determined use in that specific metal building. This is important as we discuss the custom requirements for each particular job: Every component in a steel building is designed and manufactured to meet the strict load criteria in each individual structure, ensuring that each steel building will handle all the load requirements of its specific site location. Because of this, properly designed and assembled metal buildings have withstood hurricanes, tornadoes and extreme conditions worldwide.

Quicker, Easier, and Less Expensive to Construct

Each pre-engineered steel building component is designed and made specifically for your building. Each component is designed and manufactured to match perfectly with the others. Each piece is labelled and easy to identify and each piece is cross-referenced on the assembly drawings. This means that your steel building – regardless of size, will arrive as a perfect kit, and each piece will fit together precisely. Because each component is detailed and specifically made for each particular structure, erecting the building is quick and easy. In turn, because Steel buildings are assembled quickly and easily, they require less labour. There is little to no waste and little to no cutting, sawing or welding on-site.

Wood buildings take much longer to erect than pre-engineered packages, simply because all the components are sourced and acquired separately. There is more measuring, more cutting, more margin for error and all of this takes a significant amount of time. It also produces much more waste in total, as components must be made to fit once they arrive to the job-site.

One last consideration is that the price of wood is constantly fluctuating. Frequent lumber shortages drive the cost of wood up. This encourages the use of “green” wood in construction projects which can result in warping, cracking, and splitting. These cracks in the wood members effect seal-ability, which decreases both the energy efficiency and the structural integrity of the final structure.

Safer – Over the Lifetime of the Building

Steel components won’t weather or degrade over time like wood. Steel won’t decay. Steel will remain rigid for the life of the building. This structural strength means less stress on fasteners and components; which in turn provides a safer building for years to come.

Alternatively, owners of wooden structures need to invest in continuous maintenance. With wood, wherever there is moisture close to the base, there is an opportunity for decay. Decay causes structural insecurity and increases the risk of collapse. To deal with the natural properties of wood, most wood posts are pressure treated, but this process can be poisonous to livestock or other animals if ingested.

Importantly, wood carries with it the fear of loss due to fire.  One very real peace of mind that comes with choosing a Steel building is the security that your people, livestock, and your property, are safe; because steel is non-combustible.

Greater Design Flexibility

Because steel is much stronger than wood, it allows for much greater design flexibility. You can typically span the entire width of your building with no interior posts required and the columns can be set further apart on the sidewalls. The result is a much more open building with less weight and greater structural integrity.

When wood trusses are used to accomplish wide open spaces, they must be layered and joined in several places. This increases costs exponentially. This is why wood structures typically involve several interior posts and beams that limit the useable, clear span area, decreasing work space.

Lower Maintenance Costs

Steel components won’t warp, split, twist, swell, shrink or decay, like wood. Steel components will not have to be replaced or repaired and will remain long after the wood frame building is gone.

Pre-engineered metal buildings use a minimum heavy 26-gauge sheeting for roofing and siding, as opposed to the light 28 or 29 gauge material used on most wooden pole barns. Fasteners are also higher quality for steel buildings and won’t need to be replaced like on a typical wooden pole building. The light gauge metal sheeting on most wood pole buildings will require replacement over time, and wood runners hold moisture against the light gauge metal sheeting, causing the sheeting and the fasteners to rust prematurely. In such cases, the fasteners lose their grip and the sheeting becomes loose requiring repair or replacement. Additionally, regular high maintenance is required to escape rodents and burrowing insects, and to limit the amount of rot and mold in wooden structures.

When you chose a pre-engineered metal building, these things are not issues. Steel Structures are virtually maintenance-free.

Longer Economic Life – More Durable and Worry-Free

Steel buildings simply don’t wear out over time like wooden structures. Barring some catastrophic event, your steel building will last a lifetime. Wooden buildings have an economic life of 15-20 years and require lots of maintenance along the way. After approximately 7 to 10 years, wood siding and roofing will have to be replaced. If non-metal roofing is used, it will also require replacement at some point. And as a wooden structure ages, wood members naturally dry out, which causes shrinking, warping, swelling and cracking. Preventing the wooden structural members from drying out is necessary to maintain a secure structure but requires continuous maintenance and a watchful eye.

In contrast, a pre-engineered metal building requires virtually no maintenance and provides decades of worry-free service.

Stronger Foundation

One of the first objections some people make to a steel building is that it requires a concrete foundation and floor, adding significantly to the initial cost of the project. A metal building doesn’t always require a full slab, although it does require concrete piers at each column location to provide proper structural stability and meet design load requirements. The required piers provide load bearing capacity and an above grade connection so that the posts are not subject to moisture and decay. Foundation requirements are dependent on building applications as well as site location. Local permit offices will assist in dictating which foundations will be deemed appropriate for specific buildings and municipalities.

While the foundation does add to the initial cost of a metal building system, the advantages over the life of the building are tremendous and outweigh the original expense.

Steel Construction is Better for the Environment

Steel is 100% recyclable and is the only recycled material that doesn’t lose strength when it is recycled. Remember that there is also no waste when a steel building is manufactured and erected, because no substantial cutting is required on-site and all cut-offs at the factory are recycled.

When compared to wooden construction which is wasteful and non-recyclable, Metal buildings are the best choice for the environment.

Steel Buildings Can Actually Save You Money – Year after Year

Apart from continuous savings related to maintenance, steel buildings are recognized with an “A” fire rating. Wood buildings instead, have a “C” rating for fire. Generally speaking, what that means is that a wood structure is more likely to burn. Many customers don’t realize that this non-combustibility factor can save significant money on insurance premiums for the life of their pre-engineered steel building.

Closing Out

Steel buildings offer many advantages over wood structures.

At first glance, the price savings afforded by a wood building may seem very attractive to customers. But when comparing different solutions for required construction, we recommend that our customers consider all the factors.

Compare all the costs – not just the initial costs for site prep, materials and labour, but also the longer term costs of ownership – costs like maintenance, repairs, and insurance. Decide how much value you place on safety and environmental friendliness, too.

When considering all the advantages, customers agree that the value of a pre-engineered steel building far outweigh the initial cost savings of a building made from wood.

Contact Us Today!

When you buy a building from Norsteel, we become your partner throughout the construction process. We work with you, or with your general contractor, to ensure that all your building requirements are met. Your project is our project, and we’ll be with you the whole way through.

For more information on specific building applications, click here to learn more about our line of products. If you have any questions or comments, click here to contact us today.

Most customers who are looking for a steel building have a very good idea of what they want their end project to look like. Many customers are familiar with the basic concepts and terminologies that are used to discuss structures in the Metal Building industry. All customers can benefit from a good understanding of measurements and dimensions as they process the information that they receive from their metal building provider and interact with their building consultants.

In this blog, we provide an overview of the pre-engineered steel building system. We will share some of the more popular steel building designs and go over the basic concepts of a metal building system. It is important to take some time to explain the important measurements that customers need to know and understand before they begin their search for a metal building provider.

The Metal Building System

Steel, also known as red iron, is used across a multitude of industries in the construction segment.

The Properties of Steel – What Makes Steel so Great?

The primary advantage of a steel building is its strength. Steel, as it comes from the steel mill, is incredibly versatile. It is this versatility that provides engineers with the flexibility to design Norsteel steel buildings with a high degree of accuracy. Steel is a plentiful resource – we have an abundance of it, and it is a well-accepted material world-wide. Steel has a very high degree of workability, and can be manipulated easily. It can be cut and welded, shaped and formed so that it satisfies an endless array of requirements. And steel buildings are resilient. They can take a great deal of abuse and it doesn’t wear down like other materials.

Finally, and perhaps best of all, steel is recyclable, and through the recycling process, it does not lose strength.

Building Designs

All our consultants here at Norsteel Buildings are trained to identify each customer’s specific structural requirements. Requirements are then matched to the steel building design which will fit that customer’s particular metal building specifications. Different applications and different site locations may require different designs, and not all steel buildings are created equally. Even what looks like a simple box has to be engineered to exact specifications.

At Norsteel, we supply pre-engineered steel buildings in all shapes and sizes. Because of their versatility, these steel buildings can be engineered to join to each other and to existing structures, creating an unlimited array of shapes and configurations.

Here are some of the more typical metal building designs:

Basic Concepts of Pre-Engineered Steel Structures

Tip: Many customers think of the left endwall as the front of their building. Make certain you are in alignment with your consultant when you are discussing each wall of your steel structure.

Tip: The eave height is important because in steel structures, we measure the height of the building according to the eave height (not the peak height). Some municipalities impose a total height restriction. If this is the case in your municipality, then your building consultant needs to be informed so that your eave height can be calculated accordingly.

In steel buildings, we refer to the spot where the two sides of the roof meet on the highest point of each endwall as the peak or ridge. The gable instead is the triangular section that runs from each eave line to the peak and from the eave line on one sidewall to the eave of the other sidewall.

Metal Building Packages from Norsteel all come equipped with trim to enhance appearance. The line where the endwall meets the roof is finished with a piece of trim known as rake fascia. The line where the sidewalls meet the endwall is finished with a piece of trim known as the corner trim. And the peak receives a plastic or metal cap that we call a peak cap.

Tip: Trim packages can be an effective way of enhancing the appearance of your steel building system. Trim is available to customers in several standard colours.

Measurements of Pre-Engineered Steel Structures

A thorough understanding of the measurements that determine size and appearance of a steel building is incredibly important both from an aesthetic and functionality point of view.

Roof Pitch

The roof pitch or slope is usually shown as rise over run.

Typical steel buildings can be designed in several different pitches, but depending on their width and application, most steel buildings are designed with a pitch that is ½-in-12 (.5:12 or .5/12), 1-in-12 (1:12 or 1/12), 2-in-12 (2:12 or 2/12) and 4-in-12 (4:12; 4/12).

Dimensions & Measurements

Like every other product in this world, steel building systems have three basic dimensions: width, length and eave height.The width is the distance from the outside of the sidewall girt on one side to the outside of the sidewall girt on the other side. The length is the distance from the outside of the endwall girt on one end to the outside of the endwall girt on the other end. The eave height is the distance from the finished floor to the point where the roof meets the sidewall.

Final Thoughts

When we first meet with our customers, most of them already have a basic understanding of their structural requirements. They know how they want to be able to use their building and what needs it has to satisfy; and they have a good idea of how they want their finished structure to look.

When you are collaborating with your steel building consultant, be sure you are on the same page. When discussing locations for windows and service doors, it is important to be clear where they should be located; when talking about garage door openings or hangar door locations, it is important to understand the clearance factors involved; and when you are discussing interior clear-span, usable space, it is important that you are calculating dimensions based on out-to-out measurements.

Having a basic understanding of the concepts and terminologies used in the Metal Building industry will help customers to ensure that they are communicating the essential information to their steel building consultant. But don’t be overwhelmed.

Your building consultant is an instrumental resource in assisting you to ensure that all your needs are communicated and met. It’s our job to walk you through the entire process and to make sure that your finished steel building is exactly as you envisioned it.

Contact Us Today!

When you buy a building from Norsteel, we become your partner throughout the construction process. We work with you, or with your general contractor, to ensure that all your building requirements are met. Your project is our project, and we’ll be with you the whole way through.

For more information on specific building applications, click here to learn more about our line of products. If you have any questions or comments, click here to contact us today.

In a previous blog we discussed the different Metal Building Systems in the Norsteel Product line. We touched on the basic concepts and terminologies that are important for customers to understand, as they work with their Building Consultant to design the steel building that will ultimately meet all of their requirements.

As mentioned, Norsteel’s Rigid Frame Steel Building Systems, are by far our most versatile product line. Rigid Frame Metal Buildings can be customized to accommodate unlimited applications and project needs. 

This is precisely because of the way they are engineered.

In this blog, we go over the structural support system of Rigid Frame Steel Building Systems.  A general understanding of the structural support components will help customers to gain an appreciation of how all the components work together to provide integrity and structural support for their steel buildings. This knowledge is what allows us at Norsteel, to provide our customers with innovative, cost-saving solutions. Because once you understand how the pieces go together to produce strength and support, you also know how to provide unique design solutions without sacrificing that integrity. This in turn, allows us to be creative in our approach to every steel structure.

The Structural Support System

The Structural Support System of a Pre-engineered steel building is divided into 3 main parts:

• The primary support system
• The secondary support system and,
• The bracing system

These 3 structural systems are engineered to absorb the loads and forces that are acting on the building and they transfer those loads into the foundation system.

1. The Primary Structural Support System

When we speak about the Primary Structural Support of a Pre-Engineered Steel Building, essentially, we are addressing the framing of the building.  The Primary structural support system is the main support of a pre-engineered steel building. For this reason, we often refer to the primary structural support systems as the main framing system of the building. It follows that when a frame is at an Endwall, it is called an Endwall Frame, and when a frame is within the building, it is called an Interior Frame.

Rigid Frames and Endwall Frames are laid out in a carefully engineered pattern to provide the primary support for the building. The distances between the centerline of each of the frames is called a Bay.  Bay Spacing is an important factor in determining the design of your structure. The required width of each bay is something that customers should consider because it will have an effect on where you are able to place windows, service doors, and larger garage, overhead and bi-fold doors along the sidewalls of your steel building.

Clear Span Rigid Frames

By far the most frequently used primary framing in a Pre-Engineered Steel building is the Clear-Span Rigid Frame. We call these frames “Clear-Span” simply because they have no interior columns or support between the exterior columns. An amazing thing for all customers looking to achieve 100% usable interior space! In fact, it is the Clear-Span Rigid Frame that revolutionized construction and made metal buildings such an incredibly versatile and innovative investment.

The typical Rigid Frame on a steel building has tapered vertical columns and a tapered rafter. These are the I Beams of the steel building – meaning that if you took a cross-section through either a column or rafter section, you would have an I-shape.

Typically, the rigid frame is thickest in the area where the column is connected to the rafter beam. We call this area, the Haunch.  The haunch is the thickest part of a Metal Building system simply because it is a load bearing spot in the building – it must support great force, and so, we must reinforce that area with steel.

Tip: Often, we have a customer who is trying desperately to achieve every square inch of usable space. In such cases, we employ a straight column rigid frame instead of our standard tapered column. This also comes in handy when we are trying to achieve a certain clearance under the haunch that we would otherwise not be able to accomplish. Rigid, Clear-span Frames with straight columns are usually less cost effective because they require the building be fortified in other (less ergonomic) areas.

Modular Rigid Frames

Often, a customer does not take issue with having a clear-span design. In such cases, we have the option of using a Modular Frame. Modular frames are simply Rigid Frames with intermediary columns, and the spacing between the intermediary columns does not have to be equal.   What is important here is the understanding that these extra columns provide strength and integrity to the rigid frame, redistributing the load of the force exerted on the haunch. And because the columns provide strength and integrity to the overall structure, Modular Frames can be used to bring the overall cost of a structure down. When used where they can be hidden within the architecture (e.g., in aisles or bleachers) the use of a Modular Frame does not impact the overall design of the interior of the steel structure.

The clever use of both types of framing is one way that your experienced Norsteel Building consultant will work with you to achieve the best solution for your specific building. Depending on the application for your steel building, we may incorporate both rigid frames as well as modular frames within the same design.

Tip: The dimensions between interior columns are measured from the outside of the sidewall girt to the center-line of the first interior column. On all other interior columns, the column spacing dimension is measured from the center-line of one column to the center-line of the next column, until the last interior column is reached. The column spacing on the last interior columns is again measured from the center-line of the column to the outside of the sidewall girt.

Post & Beam Endwall Frames

The most common Endwall frames are called Post and Beam Endwalls. As the name implies, Post and Beam frames are comprised of Corner Posts, End Posts and Rake Beams. They are designed to support the load for half a bay of the roof and to support the addition of framed openings for windows, service doors and, garage or roll-up doors.

In some cases, a Post and Beam Frame may be used as an Interior frame. We call this a Recessed Endwall. In such cases, a rigid frame is used to provide a huge overhang porch and the post and beam is used in the second bay as the entrance way. Many farm-house designs are laid out in this way in order to achieve the look of a large covered front veranda. Such designs are also used for drive-through windows of retail outlets, and for some car ports.

In still other cases, the Endwall Frame must be designed as a Rigid Frame, so that the structure is already prepared for future expansion and length may be easily added to the structure at a later time. In this case, we call it an Expandable Rigid Frame Endwall. In some cases, an Endwall may be designed as a rigid frame so that it can be capable of holding the weight of a large opening or hangar door.

Tip: Metal buildings are relatively easy to expand by lengthening, which involves disassembling bolted connections in the Endwall, removing the wall, and installing an additional clear-spanning frame in its place. The removed Endwall framing can often be reused in the new location. Matching roof and wall panels are then added to complete the expanded building envelope.

2. The Secondary Structural Support System

When we are speaking about the Secondary support system of a pre-engineered metal building system, we are referring to the Purlins and Girts. These structural members are the steel components that run horizontally across the roof and walls, spanning the primary framing.

Girts and Purlins are essentially the same with the only difference being their location on the building, and they have 2 main functions: To transfer the loads to the primary framing, and to provide a surface onto which the roof and wall panels are screwed.

The Purlins

We refer to the secondary system that provides structural support to the roof as the Purlins.

Purlins run horizontally between the frames of the roof. They are all-steel, z-shaped members.  The purlins on a rigid frame steel building are typically 8 and 10 inches deep, but are available in 12 and 14 inches when loading conditions require thicker reinforcement. The depth of the purlin as well as the spacing, is determined by the engineering itself and is dictated by both the design of the structure as well as its location.

The job of the purlins is to transfer roof loads to the primary structural support system, which in turn transfers the loads to the foundation.

The Girts

We refer to the secondary system that provides structural support to the walls as the Girts.

Girts run horizontally between the frames of the walls and are attached to the columns.They are Z-shaped, similar to the purlins on the roof, and also come in C-shape which can be used around framed openings. The Girts take the loads imposed on the covering system and transfer them to the frames, which in turn, transfer them to the foundation.

The spacing of the Girts, varies with the load imposed on them. The depth of the Girts used in a structure is also determined by the particular loading requirements for that structure. Like purlins, girts are typically 8 or 10 inches in depth. Occasionally, 12 and 14 inch secondary members are necessary for specific applications and site locations.

Tip: It is important to take the diminished clearance imposed by the structure itself into consideration, when determining the actual measurements of interior space.

One last thing to mention when we are discussing secondary structural members of a metal building rigid frame system, is that the Eave Strut is located at the intersection of the roof and the exterior wall. It acts as both the first Purlin and the last Girt. This is important because the building eave height is measured to the top of this steel member.

3. The Bracing System

The final structural support system of a Rigid Frame Steel Building is the Bracing system. As its name implies, the bracing system functions to resist the forces of the elements and to transfer these loads to the secondary and primary framing systems. There are several types of Bracing Systems that are used in Pre-engineered Steel Buildings. The most common are Rod Bracing; Portal Frames and Diaphragm Bracing.

Rod Bracing

Rod bracing or X-Bracing, is by far the most common type of bracing used to brace the building against forces from the elements, on a steel building system. The rod bracing in a steel structure is found in the roof between the rafters, and in the walls between the columns. Where the bracing goes and how much is needed depends on the design of the building and its location. A structure that is situated in a municipality with high wind load for example, will require more bracing than one in a different municipality with mild wind. Likewise, a structure designed with an open wall, will require more bracing than a structure that is completely closed.

Tip: The location of Rod Bracing on a rigid frame steel structure is pre-engineered and cannot be moved on site without seriously affecting the integrity of the metal building system. When you work with your Building Consultant to arrive at a design that you are happy with, one important thing to discuss is the location of service doors and windows. Although both are field located (meaning that their precise and final locations can be determined on the job site), it is important to ensure that the bracing for the building will not interfere with the desired openings.

Portal Frames

Where it is not an option to use X-Bracing in a steel building, or when we require more strength in order to provide rigidity and structural stability to the metal building, a portal frame is used.  Essentially, a portal frame is a rigid frame that is pre-engineered to reinforce the steel structure. By lining the bay along the sidewall of the metal building, the portal frame reinforces the structure to resist strong longitudinal loads. Typically, if there is a portal frame on one side of the building, there is also a corresponding portal frame directly across from it, on the other side of the structure.

Tip: Again, here it is important to take the diminished clearance imposed by the structure itself into consideration, when determining the actual measurements of interior space. The portal frame is as thick as a rigid frame and will add significant feet in all directions. Make certain to discuss the minimal clearance available in each bay with your Building Consultant so that you are clear what size door openings will fit in the space.

Tip: There are several different options for Wall and Roof systems. Insulated Metal Panels; stucco finishes, faux wood and brick options – Wall cladding comes in several different configurations and several colours. The possibilities are numerous and will be discussed in more detail in future blogs.

Closing Out

In this blog, we went over the structural support system of the Rigid Frame Steel Building System. We discussed the primary and secondary structural systems and we discussed bracing. We discussed how these 3 structural systems are engineered to work together to absorb the loads and forces that are acting on the steel building and to transfer those loads into the foundation system.

An understanding of these structural components will help customers to gain an appreciation for the engineering behind their steel buildings, and how they are constructed. It will help them to plan for the design of their steel structures and for the location of functional access items like doors and windows.  Understanding the structural support systems of Rigid Frame Steel Buildings – how they are engineered to work together and why they are important in the design of their structures, is a great way for customers to begin a dialogue with their Building Consultant. It will also help customers to discuss construction when they are working with general contractors and erecting crews.

Here we have provided a general overview of the structural support system of a Metal Building System that uses a Rigid Frame design. In a future blog, we will discuss other components, things like door and window framing; gutters and downspouts; overhangs, insulation, and other accessories which can be added to all our Pre-engineered Steel building products.

Click the button below to download Norsteel’s rigid frame brochure.

Contact Us Today!

When you buy a building from Norsteel, we become your partner throughout the construction process. We work with you, or with your general contractor, to ensure that all your building requirements are met. Your project is our project, and we’ll be with you the whole way through.

For more information on specific building applications, click here to learn more about our line of products. If you have any questions or comments, click here to contact us today.