In the world of modern construction, the use of prefabricated materials and structures has gained a lot of attention due to time savings, increased precision, and reduced costs. One of the most important and widely used components in ceiling frameworks is the industrial joist, which has replaced traditional methods and plays a key role in speeding up construction projects.
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However, purchasing industrial joists isn’t just about choosing a ready-made product. It also requires careful examination of technical specifications, manufacturing quality, the producer, and compliance with your project's engineering drawings. Here, we’ll review the most important points you should consider before purchasing industrial joists, so you can make well-informed and confident decisions.
An industrial joist is a core component in the construction of concrete ceilings and steel structures. Its main job is to support and transfer the loads imposed on the ceiling to the side supports (walls or main beams). This type of joist is prefabricated in factories and is typically made from a combination of rebar, trusses, plates, or steel sections.
Unlike traditional joists which may be built onsite, industrial joists are manufactured in controlled factory environments, which results in improved quality, uniform dimensions, and minimizes human error. Thanks to precise design and machine production, these joists can reduce the dead load of the structure and significantly increase the speed of implementation.
Common applications for industrial joists include:
Using industrial joists not only speeds up construction but also ensures structural strength due to higher quality. Of course, to achieve these benefits, proper selection of the joist type and assessment of its technical features are essential.
When choosing a joist type for a construction project, it’s crucial to understand the differences between industrial and traditional joists. Each has its own features, advantages, and disadvantages, and depending on the nature of the project, budget, timeline, and site conditions, one might be preferable over the other.
Traditional Joist:
This type of joist is usually made onsite or in local workshops. Traditional joists are built from rebar, concrete, and sometimes temporary forms, often assembled or welded by hand. Their quality control depends heavily on the skill of the workforce and available equipment.
Industrial Joist:
By contrast, industrial joists are manufactured in fully equipped factories using specialized machinery. This process adheres to stricter standards and produces more reliable results. Welded joints, truss designs, and the entire production process follow engineering drawings and technical guidelines.
Overall Comparison:
In general, if quality, speed, and accuracy are your priorities, industrial joists are the better choice. However, for small-scale projects or those with very limited budgets, traditional joists may still be used.
The cost of industrial joists is one of the most important factors that clients and contractors consider when making a purchase. While the initial price of industrial joists is usually higher than that of traditional ones, advantages such as better build quality, high precision, reduced material waste, and faster installation ultimately reduce the total project cost over the long term.
Below are the most important factors affecting the price of industrial joists:
· Type and quality of raw materials
The main factor determining cost is the type of steel and rebar used in production. Joists made from high-strength rebar in compliance with engineering standards offer better quality and have a higher price.
· Joist length and design
The longer and more complex the joist, the more raw materials and careful design it requires. Joists designed for larger spans or heavier loads are often more expensive.
· Production costs and labor wages
The use of advanced machinery, higher quality welding, technical supervision, and skilled personnel—all increase production costs and therefore the final price.
· Steel and iron market fluctuations
The price of raw materials like steel and rebar is heavily influenced by domestic and international market conditions. Any change in global steel prices or exchange rates can quickly cause joist prices to rise or fall in the short term.
· Transportation costs
If your project site is far from the manufacturing plant, transportation fees can significantly impact the total price. The weight of each joist and the type of transport used also matter.
· Order volume
In many cases, manufacturers offer discounts for bulk purchases. So the higher your required quantity, the lower the unit price can become.
Although industrial joists may seem more expensive up front, when you factor in quality, time savings, reduced implementation errors, and lower additional costs, they are actually a more economical choice in the long run. When buying, don’t focus solely on cost; instead, consider the price-to-quality ratio and services offered for a safe and professional decision.
1. Before purchasing, make sure the joists are manufactured according to Iranian national standards or international standards. Points to check include welding quality, type of rebar used, quality control in the production line, and performed tests.
2. Each joist must be chosen according to the project’s engineering drawings and based on the intended span, live and dead load capacities, and installation conditions. It’s best to ask the manufacturer for the load-bearing tables and technical specifications, and discuss them with your project engineer.
3. The price of a joist depends on factors such as the type and thickness of steel, joist length, engineering design, shipping costs, and market fluctuations in steel. The cheapest option is not always the best; always consider the quality-to-price ratio.
4. Buying from a reputable and experienced manufacturer ensures quality and timely delivery. Look for the following:
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· Standard certification
· Track record and completed projects
· Customer satisfaction
· Possibility to visit the production line
Purchasing industrial joists is an important and specialized decision in any construction project. Choosing the wrong type can not only increase costs and cause delays but also compromise structural safety. To make an informed and proper choice, it’s vital to consider factors such as build quality, compliance with engineering drawings, manufacturer credibility, and analyze the price relative to quality.
By carefully considering the joist’s technical specifications, examining factors affecting price, comparing industrial and traditional joists, and consulting with structural engineers, you can be confident your choice will result in higher quality, safety, and savings in both time and money.
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If you are active in the production of industrial joists, construction materials, or technical and engineering services, SharMarket offers you a unique opportunity to showcase your brand to thousands of potential customers in target markets.
In North America residential construction, wood has long been a material of choice: abundant, readily available, flexible, and easily repairable, it is less expensive than steel and concrete, and is naturally an overwhelmingly popular material.
For some 40 years now, engineers and builders have had the choice between using traditional lumber or engineered wood for their construction. Now, in new residential buildings, more often than not, a combination of both is being used.
When it comes to floor systems, conventional wood has enjoyed a long tradition of use, created by a universal familiarity with the product as well as the amount of experienced, highly qualified workers using it.
Nowadays however, engineered wood floor systems are undergoing rapid market growth due to their many advantages over traditional wood. Engineered wood is more sustainable, using less trees and costs less to use per square foot. It weighs less and is easier to handle, saving time and money on construction sites. It is also stronger and more rigid in its support. Also, depending on the product you are using, you can easily adjust it on site, whether because of a deviation from the original plan or an adjustment to a non-conformity.
Two types of engineered joists are most frequently used in floor systems today:
I-joists have major advantages in high-volume construction with standard layouts. This is because they are less expensive. Also, you can adjust their length is onsite, without an engineer’s approval. However, they can’t attain the spans of open web trusses. They are somewhat complex to run Mechanical, Engineering, and Plumbing through. This is due to the properties of the OSB paneling. There are some pre-defined hole locations but they are very small, and any additional holes to be made must follow strict guidelines so as not to compromise support.
Open web trusses, on the other hand, have the advantage in more complex and more rugged construction. Their spans can be much longer than I-Joists. Open web design can accommodate almost any kind of HVAC, Electrical, and Plumbing configuration while allowing greater flexibility during installation. This is a time and money-saving characteristic.
They have specific lengths. You can’t trim them. This is their main disadvantage when on site. To adjust the open-web trusses’ length requires an engineer’s approval. Otherwise, it needs to be replaced. Either way, it requires an engineer’s seal. In both cases, this causes project delays. You need to add this to the open web trusses’ already higher cost.
One more thing: the metal connector plates used in this type of engineered wood joist are sharp. They can damage electrical wiring during installation. Pull the plate hard enough and some of its teeth can come out of the wood. This could compromise structural integrity. Also, trusses exposed to rain prior to the closing of the structure can rust. Sealants are available to coat the plates and make them waterproof. They require on site application.
So, there are advantages and disadvantages to open-web trusses and I-joists but there is also a 3rd hybrid type of joist that is gaining in popularity, which effectively combines the advantages of both.
TRIFORCE® joists feature an open web design but do not use metal connector plates. TRIFORCE® is assembled with finger joinery and waterproof heat-rated adhesive.
You can adjust their length on site because of a trimmable OSB end panel. Joists are available in several depths and lengths and superior strength allows them to span up to 30 feet (TRIFORCE span tables). TRIFORCE® joists can fill the bill for any type of wood frame construction.
TRIFORCE® costs less than open web trusses yet is as strong and as rigid. It has the added benefit of being adjustable onsite. This open joist TRIFORCE® is a compelling alternative in engineered wood floor systems, well worth investigating.
Open joist TRIFORCE® combines the advantages of other engineered joists to provide peace of mind underfoot.
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