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  • Factors Affecting The Cost Of Steel Structure Buildings
    Factors Affecting The Cost Of Steel Structure Buildings
    Sep 22, 2023
    Steel structure buildings are increasingly popular in the construction market due to their rapid construction speed, factory-made components, high level of industrialization, good appearance after installation, long service life of steel materials, durability, and recyclability of materials. As the popularity of steel structure workshops continues to grow, the issue of construction cost has also attracted more and more attentions. How to ensure the durability of the steel frame structure while controlling the cost has become a key concern for many steel structure suppliers. Below are some key factors affecting the cost of steel structure workshops and how to control costs through reasonable design and construction management.   Raw Material Factors: Steel and sheet steel materials are the main components of the steel prefabricated building's framework, accounting for about 70% to 80% of the total cost. Fluctuations in steel market prices due to supply and demand directly affect the cost of the steel prefabricated buildings. The cost of light steel structures varies with different materials and specifications of the sections, as well as the thickness and material of the cladding plates. Therefore, raw materials are a key factor affecting the cost of light weight steel structure garages.   Design Factors: Reasonable design is the key factor for saving raw materials and controlling budget. Different design drawings will affect the amount of raw materials used, thereby affecting the total cost. Experienced designers, by considering the location and environment of the steel structure workshop, as well as the specific needs of the client, can provide cost-effective architectural design drawings. Similarly, in environments with few earthquakes or low wind forces, excessive stacking of materials or over-emphasizing the seismic capacity of the steel framed structure often leads to a sharp increase in construction costs. Therefore, choosing a designer with industry experience is crucial during the design phase of the steel structure buildings.   Foundation Design: The cost of the foundation is closely related to geological conditions. The construction of the foundation is an important factor in the stability of the steel structure factory building, and its construction period accounts for about 25% of the total construction period, with the cost of foundation construction accounting for 15% of the total cost of the steel structure project. In the design phase, it is necessary to fully consider the geological report, choose the appropriate foundation type, and reasonably control the size and depth of the foundation to effectively control the total cost. For example, in areas with soft soil, the foundation depth is deeper, and the cost is often higher. In areas with hard soil, the foundation for the steel structure is shallower, and stability can be maintained without the need for a deep foundation.   Column Grid Design: The column grid layout determines the span, spacing, and number of columns in the steel structure building. Under the premise of meeting the needs and process requirements, it is preferable to choose a small-span portal steel frame. Although this small-span design increases the number of columns, it reduces the use of materials such as the steel structure roof and steel beams, achieving better economic benefits. The economic column spacing is usually 6 to 9 meters, and exceeding this range will increase the steel consumption and thus the cost. Of course, the number and layout of columns should not only meet economic requirements but also consider the needs of the steel structure workshop. In some steel structure industrial building that need to be used as warehouses, an overly dense number of columns increases the risk when vehicles enter and exit or when moving items.   Beam Design: The rectangular section beam is a common bending member, often used in design, but has a low material utilization rate. One reason is that the material stress near the neutral axis is low; the other is that the bending moment of the beam changes along the length. Because most sections of the equal section beam have low stress, the material is not well utilized, and the material utilization rate can only be improved when the beam is subjected to axial force. Therefore, during the design, planar trusses can be used to replace rectangular beams. Planar trusses are equivalent to hollowed beams, removing excess material from the beam, which is both economical and reduces self-weight. It can also develop into a spatial grid, greatly improving the material utilization rate.   Construction and Installation Factors: The length of the construction period also affects the cost. A long construction period often leads to an overspend in the overall budget of the prefabricated steel structure workshop. How to save the installation and construction period to reasonably control costs is particularly important. Among them, the proficiency of the installation team is the key to determining the construction period. Experienced installation teams, through reasonable time arrangements for the assembly of various components and the reasonable use of engineering machinery and equipment during installation, can improve installation efficiency without increasing a large amount of installation costs. Building a steel structure workshop is a complex system project, involving many aspects such as the construction period, policy changes, and project scale, all of which can affect the cost.
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  • Analyse The Causes Of Steel Structure Instability And The Avoidance Of Steel Structure Accidents
    Analyse The Causes Of Steel Structure Instability And The Avoidance Of Steel Structure Accidents
    Dec 07, 2023
    Steel structure projects, fundamentally, involves the use of metal steel as the primary material in constructing various structural parts such as beams, columns, and trusses from sections like I-beams and steel plates. The connection methods vary due to the different materials used, including welding, bolting, and riveting. A qualified steel structure building must adhere to safety in both construction and design, following steel structure design drawing and ISO9001 standards, and must be constructed according to industrial regulations. Selecting a safe installation team is very important, which involves having a standardized team with specific construction requirements and company standards. An excellent installation team is the core of a steel structure company.   Steel framed structures are widely used due to their numerous advantages over concrete. However, instability in prefabricated steel buildings, which occurs when the load-bearing capacity reaches its limit, can lead to accidents. Understanding the causes of instability is essential to prevent such incidents.   There are three main types of steel framed structures instability:   Bifurcation Buckling: This involves the complete axis and mid-surface under external forces, also known as branch point buckling, and includes cylindrical shells under pressure. Ultimate Load Buckling: This occurs when eccentrically compressed members can no longer maintain stability after reaching a certain degree of plastic deformation, including bi-directional bending members. Snap-through Buckling: This type does not have a bifurcation point or an ultimate load point but can still lead to significant deformations that must be avoided to prevent structural damage.   Factors contributing to steel structure workshop accidents include:   Design Errors: Poor design due to a lack of experience or understanding of stability concepts can lead to accidents. Manufacturing Issues: Initial curvature, eccentricity, and residual deformations from welding affect stability. Insufficient Temporary Support: During installation, the steel frame structure must be supported to maintain stability.   To prevent accidents, measures include:   Improving Designers' Qualifications: Enhancing the professional quality of designers to ensure a comprehensive understanding of stability factors and accurate calculations. Reducing Defects in Steel Frame Structures: Controlling defects such as initial curvature and eccentricity through proper manufacturing processes. Safety in Construction: Implementing safe lifting plans and temporary support setups to ensure stability during installation. Proper Use of Steel Structures: Regular inspection and maintenance to prevent the use of damaged light weight steel framed structures and consulting with professionals before altering the load-bearing capacity of components.
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  • How to Avoid Common Pitfalls in Steel Joints: A Guide to Consistent Tightening and Correct Torque
    How to Avoid Common Pitfalls in Steel Joints: A Guide to Consistent Tightening and Correct Torque
    Aug 08, 2019
    In the area of steel structure construction, the excellence of connections is paramount. A solid connection not only upholds the prefabricated steel frame structure building's strength but also boosts its safety and lifespan. We'll discuss the reasons behind these problems, their potential impacts, and offer smart solutions.   Uniform Tightening: The Key to a Seamless Fit Before you get your hands dirty with installation, it's vital to iron out any kinks in the components to keep them in line. For a uniform tightening process, start from the heart of the connection and work your way out symmetrically. Plus, wielding the right tools for the job is a must to dodge over-tightening and uneven force. For example two beams are linked by a steel structure. Uneven bolt tightening could spell disaster for load-bearing, shaking the very foundation of stability. By hammering home the need for uniform tightening, we dodge a bullet of structural jeopardy.   Torque Values: Precision for High-Strength Bolts When you're in the business of high-strength bolts, nailing the right torque is non-negotiable for airtight connections.  A sloppy paint job or a smudge could be a deal-breaker. Let's get real about torque: in a steel structure where high-strength bolts are the glue between a column and a beam, over-torqueing could lead to stress overload, courting disaster like bolt breakage or a catastrophic collapse. So, let's drive home the point—sticking to torque specs is your safety net against such perils.
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