Structural Frames

3.0 Part B: Structural Frames

3.1 Portal Frame in Steel

Function

The function of portal frame in steel is to lower the load strength by distribute the loads from the super structure, and expansion it to a great area so that the strength of the load will not over the safe bear the weight of capacity. Special foundation measure hold back the distress in the super structure, due to expand or contract of the sub soil because of humidity movement in something matter of soils. Lastly, it offer provision of level surface, so that the super structure can be construct on top of the foundation. It can support loads from the super structure and transfer it to the ground.

Material and Method used

There are rarely ways applied to build a steel portal

No exceptional fasteners are required, and fewer employees are required to entire the process. No cutting, retaining, and hammering simultaneously long, hefty and bulky planks.

6) Strength and Durability

Structural steel components are lighter and stronger than weight-bearing wood or concrete products. A typical weight-bearing steel fabrication is 30% to 50% lighter than a wooden equivalent. This makes steel frame construction far stronger and more durable than traditional wood framed alternatives.

7) Improved Construction Quality

A steel frame building does not age and worsen like wooden structures manage over time, so as a homeowner you don’t have to concern about any feeble spots. Steel is corrosion resistant, it is dimensionally steady and it furthermore continues directly, no anxieties about distorting with climate changes.

8) Interior Partition Walls

Steel studs are a good choice for interior partition walls, where the conductivity of steel doesn't matter. In other words: steel framing (for interior walls) can combine with wood-frame or other building system. That’s a way of overcoming the low thermal resistance of steel, while benefiting from its advantages.

9) Moisture and Weather

This obviously can’t happen with steel. The measurements of steel need to be precisely calculated in advance, because a steel fabrication is delivered to site in its final form, ready to be slotted into the building.

7) High Maintenance Cost

Most steels must be painted at regular intervals because if they are freely exposed to air they get corrode. This requires extra cost and special care. If we use weathering steel then this will eliminate this cost. If steel structures are not properly maintained then they can be 1 to 1.5 mm of their thickness each year.

8) Fatigue and Fracture

Large variations in tensile strength expose steel elements to excessive tension, which reduces its overall strength. Steel is also susceptible to brittle fracture when it loses its ductility. This increases its chances of buckling, which is typically counterbalanced by adding expensive steel columns that stiffen the primary structure.

9) Fireproofing Costs

Although steel members are incombustible in nature, their strength is tremendously reduced at temperatures prevailing in fires. Steel is an excellent conductor of heat. It may transfer heat from a burning compartment of a building to start fire in other parts of the building. Extra cost is required for properly fire proof of the