Steel Building Vs Pre-Cast Concrete

1. Pre-cast concrete & Steel
frame work
Presented by
Thananchayan

2. The Proposal
 Have to Build a mobile show room
 With less restriction
 With larger span
 Within less time

3. Mobile Show Room

4. Our Analysis of Alternatives
 Considering Pre-cast concrete
 Considering Steel Frame work

5. Pre-cast Concrete
• The concept of precast also known as “prefabricated”
construction includes those buildings, where the majority of
structural components are standardized and produced in
plants in a location away from the building, and then
transported to the site for assembly.

6. PRECAST STRUCTURAL ELEMENTS
1. Foundation.
2. Beams.
3. Columns.
4. Floor.
5. Walls.
6. Slab.
7. Stairs

7. Steel Frame Work
• The use of steel is becoming more popular in the
present construction industry, specially in the
construction of medium and high rise buildings.

8. Sri Lanka Standards
 The load calculations, analysis and design of steel
frame should be done according to BS 5950 – 1:
2000. The guidance given in BS 5950- 2:2001 should
be followed for fabrication and erection.

9. What we proposed…..
Steel Building

10. Reasons….
 Requirement is immediate
 Single storey
 Larger spans without restriction

11. Steel Building Advantages
 The steel is manufactured under factory conditions and
fabrication also will be done in steel yards or in
factories. Hence the quality of materials and the
accuracy of fabrication are very high.
 Speedy erection.
 less work at the construction site.
 Flexibility.
 Value for money.
 Steel can be easily maintained so that colour and
appearance can always be made to suit a constant or
changing environment.

12. Standard Steel Sections

13. Columns & Beams connecting

14. Beam to Beam connecting

15. Column & Base connecting

16. Column to Roof connecting

17. Fire Safety
Structural steel loses strength and stiffness at high
temperature levels, like any other building materials
Although steel is a non-combustible material, it has a
high heat conducting value, which adversely affects
the structural performance during fire exposure.
The structural strength of steel decreases by as much
as half at temperature of 600 degrees Celsius. That is
why it is important to address an effective steel
building fire design.

18. The designer must consider the following
matters in the structural fire design.
• The fire development scenario and spread of a fire in
the building.
• Possible building occupants and their safe evacuation
under a fire threat.
• Fire warning systems and evacuation procedure
• Ventilation conditions in the building under fire
• Structural response of building materials against fire
effect
• Related fire code requirements on the building design.

19. Passive fire protection system
Spray Coating

20. Insulating

21. We choose…..
Spray coating method
 Economical
 Can get a good smooth finishing look
 Additional Painting not needed
 The Spray can stand up to 4 hours in fire

22. PRE STRESSED CONCRETE
Pre-stressed concrete: Pre-stressed concrete is a
method for overcoming concrete natural weakness
in tension
Pre-stressing can be accomplished in two ways:
1. pre-tensioned concrete
2. post-tensioned concrete.

24. Beam to Column connection

25. Beam to Slab connection

26. Questions & Clarifications

27. Thank You