Portal Frame Design With Example

Portal Frame Design with Example
Design Steps:
1. Design of slabs
2. Preliminary design of beams and columns
3. Analysis
4. Design of beams
5. Design of Columns
6. Design of footings
A portal frame hinged at base has following data:
Spacing of portal frames = 4m
Height of columns = 4m
Distance between column centers = 10m
Live load on roof = 1.5 kN/m2
RCC slab continuous over portal frames. Safe bearing capacity of soil=200 kN/m2
Adopt M-20 grade concrete and Fe-415 steel. Design the slab, portal frame and foundations and sketch the details of reinforcements.
Solution: Data given:
Spacing of frames = 4m
Span of portal frame = 10m
Height of columns = 4m
Live load on roof = 1.5 kN/m2
Concrete: M20 grade
Steel: Fe 415


  1. why portals are not fixed …why hinged why that small gap in columns

    what is the advantage of hinged columns in general …where they are mostly used …this may pl be explained…also moments can be evaluated by kanis rotation mrethod also

    shall be very thankful if answered…

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