Sloping slabs under gravity load would be subjected to bending and axial thrust.
Structural design of rcc sloped roof pdf.
It is the form most commonly used by the navy.
A gable roof has a ridge at the center and slopes in two directions.
Different boundary conditions are considered like pyramidal panels a with and without ridge beam b with and without edge beam c supported on wall and d supported on columns with.
Rcc slab roof design example structural concrete roof or slab is made waterproof by applying stabilised bitumen sheets the floor is first cleaned and then some bitumen is sprinkled over the surface and then bitumen stabilised sheets are rolled over the surface and joined with other at edges by applying heat through gas torch.
In staad there is one option available to give this slopped roof loads by using py direction.
Pdf chapter 2 structural design of rcc building.
This structural design process has been carried out under use of bs8110 design code of practice.
It is simple in design economical to construct and can be used on any type of structure.
It is the strongest type of roof because it is braced by four hip rafters.
Hip the hip roof has four sloping sides.
The primary aim of the work is to analyze and design the pyramidal roof slab.
Roof snow drift surcharge a n g l e note a 15 increase in the allowable capacity of wood for loads that include snow which is a short term load snow loads 7 12 cs 0 99 slope 8 12 0 91 9 12 0 83 10 12 0 75 11 12 0 69 12 12 0 63 note that roofs exceeding an angle of 30 degrees may reduce the ground snow load.
According to the 1995 aci code all two way reinforced concrete slab systems including edge supported slabs flat slabs and flat plates are to be analyzed and.
Especially computations have been made by use of bs 8110 based spreadsheets.
Publication produced by the reinforced concrete council rcc as part of its project spreadsheets for concrete design to bs 8110 and ec2.
Thanks srinivasan v structural engineer sharjah uae.
Model the beam slab as per your slope requirement then assign the load through py option instead of gy fy.
Along the slope ii across the slope depending upon the boundary conditions.
If the problem is statically determinate the equilibrium equations would.
Based on the boundary condition you can determine the axial thrust and the bending moment.