Common Mistakes When Installing WF That Can Reduce Structural Strength

Wide Flange (WF) is one of the most frequently used steel profiles in building construction, especially for columns and main beams. By design, Wide Flange (WF) has high strength to withstand compressive and bending loads. However, this strength can be drastically reduced if improperly installed in the field.

Unfortunately, many Wide Flange (WF) installation errors are considered trivial, yet they directly impact the stability and lifespan of the building.

1. Wide Flange (WF) Not Installed Perpendicularly
One of the most common errors is a WF that is tilted or not perpendicular to the structural axis. This condition causes uneven load distribution and triggers stress concentration at certain points.

In the long term, a wide flange (WF) that is not perpendicular can cause:

• Structural deformation
• Cracks at joints
• Reduced load capacity

2. WF Positioning Not According to Structural Drawings
WF must be installed in the direction and position specified in the working drawings. Incorrect orientation, such as misaligned flanges or webs, can reduce the WF's ability to withstand bending and compressive forces.

Changing the position without recalculation risks causing the structure to not perform according to the initial design.

3. Welded or Bolted Joints Not Conforming to Specifications
Joints are critical points in steel structures. Common errors include:

• Weld sizes not meeting standards
• Undertightened or incorrectly graded bolts
• Bolt spacing not meeting specifications

As a result, the joints become weak points that can fail before the WF element itself.

4. WF Shifts During Erection
During the erection stage, the WF must be properly secured and locked before final tightening. If the WF is allowed to shift or is not temporarily stabilized, the final position can deviate from the plan.

This error often occurs due to rushing to achieve work progress without adequate installation controls.

5. WF Surfaces Not Inspected Before Installation
WF that is dirty, heavily rusted, or deformed should be inspected before installation. Unsuitable surfaces can:

• Improve the quality of welded joints
• Reduce bolt adhesion
• Accelerate corrosion after installation

6. Ignoring Tolerances and Alignment
Every steel structure has certain tolerance limits. Ignoring alignment between steel members, especially in long spans, can cause:

• Misalignment of beams and columns
• Additional unplanned loads
• Reduced overall structural performance

The Importance of Proper Steel Member Installation
Steel members are designed to perform optimally if the materials and installation both meet standards. Installation errors are not only a matter of aesthetics, but also affect the safety and long-term durability of the building.

• Therefore, in addition to competent labor, selecting quality steel members is also crucial.
• To ensure optimal structural strength, ensure you use SNI-compliant steel members that meet design specifications.

PT Intisumber Bajasakti provides various sizes of steel members for construction project needs, with guaranteed material quality, ready-to-ship stock, and professional technical support.

📞 Phone: 021-66675999
🌐 Website: intisumberbajasakti.com
✉️ Email: info@intisumberbajasakti.com

Contact PT Intisumber Bajasakti now for a product consultation and the best offer to suit your project needs.

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