Steel vs Concrete

• Low manpower count is needed.

• High manpower count is needed

Cost

• Construction cost is low at site.

• Construction cost is High at site.

Erection Time

• Fast Erection process resulting in less time consumption.

• Slow Erection process resulting in less time consumption.

Error Modification

• Easy to modify on site,even after erection.

• Difficult to modify as it requires breaking concrete.

Ductility

• Show signs of failure when overloaded

• May result in disastrous collapse without warning signal

Consistency

• Strength is assured from Design.

• Strength cannot be guaranteed without testing.

Reliability

• Steel Properties are stable with time.

• Concrete Properties may change over time due to environmental conditions.

Delivery and Logistics

• Can be delivered anywhere in the world
• Can be properly sequenced

• It has to be build on the site itself
• Might have to build batch plant on site,if site is secluded or huge

Building Dimensions

• Suitable for larger span buildings,20-30m.
• Sustainable for larger spans.

• Suitable for shorter span buildings,5-8m.
• Not sustainable as it becomes difficult and heavy for larger spans

Seismic Effect

• Ductility of steel provides flexible behavior under seismic loads
• Steel is heavier than concrete but is 18 times stronger

• Poor flexibility under seismic loads

• Urge portion of concrete strength consumed to resist effect of its own weight

Fabrication

• Fabrication of members are done under controlled environment.

• Precise Fabrication

• Fabrication of members are done on the site.
• Before pouring the concrete ,it requires to build reinforcement cage and shuttering work.

Industrial Applications

• Can easily handle equipment such as multiple cranes within building

• Precision can be achieved during installation

• Handling heavy equipment such as cranes is limited

• To achieve precision during installation contractors use steel I beams and Platforms in concrete buildings

Expansible

• Expansion is easy.
• Longitudinally expansion is about adding more bays and connecting the secondary members and the sheeting to the old building.

• Expansion is difficult.
• The contractor has to build a new structure with foundations,columns and might have to break part of the old structure in order to expand it.

Quality

• Improved Quality Factors as follows:
• It is a homogeneous product.
• Precise machinery is used for fabrication.
• According to shop drawings ,pieces are tailored.
• Quality is not affected by weather conditions.

• Deteriotating Quality Factors as follows:
• It is not a homogeneous product.

• It is difficult to maintain concrete mix ingredient rations.
• Affected according to labour experience in pouring,use of vibrators and curing methods.
• Quality is affected by weather conditions.