How do you calculate the effective depth of concrete?
Table of Contents
How do you calculate the effective depth of concrete?
Effective depth of beam is calculated over all deep of beam minus effective cover of beam. Now discuss about what is effective cover. Effective cover is distance between centroid of tension Steel to bottom extreme face of concrete tension fibre where maximum tension is present.
What is overall depth and effective depth?
The effective depth is also used to find the critical punching perimeter and is used in the shear capacity calculations. In this instance the effective depth of a slab with fibre reinforcement or no reinforcement should be taken as 0.75h, where h is the overall depth.
How do you calculate the overall depth of a beam?
As per IS code 456 depth and width of beam depend on its length of beam and various types of load acting on it. according to as per IS code 456 minimum depth of simply supported beam is about L/20 and minimum width of beam is about depth/1.5.
What is the overall depth?
overall depth means the vertical distance between the uppermost deck at the side of the vessel and the bottom of the keel, measured at the middle of the overall length; Sample 1.
What is effective span?
The distance between the centers of support, or the clear distance between supports plus the effective depth of the beam or slab, the lesser value being taken.
What is overall depth of slab?
2. Thickness of Slab
| Type of slab | Ratio of span to depth |
|---|---|
| Continuous and spanning in one direction | 35 |
| Simply supported and spanning in two directions | 35 |
| Continuous and spanning in two directions | 40 |
| Cantilever slabs | 12 |
What is the formula for calculating depth?
Divide the sum of the depths by the number of items you measured. In the example, 35 divided by 5 equals an average depth of 7 inches.
What is the thumb rule for beam depth?
However, as a rule of thumb, it is better to use a depth which is two and a half to three times the beam’s width. For long-span beams, it is economical to use deep and narrow sections.
How do you calculate effective span?
For end span with one end free and other continuous, the effective span shall be equal to the clear span plus half the effective depth of the beam or slab or clear span plus half the width of discontinuous support whichever is less.
How do you determine effective span?
For end span with one end free and the other continuous, the effective span is equal to the clear span + half the effective depth of the beam or the clear span + half the width of the discontinuous supports, whichever is less.
How do you calculate the span of a slab?
The calculations based on IS 456 is given below: Clear span l n =4200mm….Effective span of continuous beams and slabs.
| Support B | Support C | |
|---|---|---|
| Fig. to use | Fig.(b) | Fig.(b) |
| h | 350 | 350 |
| t | 300 | 300 |
| ai = lesser of {h/2; t/2} | 150 | 150 |
How to find the effective depth of a concrete slab?
From the overall depth of such slab, deduct clear cover and radius of the main rod to get the effective depth of the slab.Always take shorter span for finding out the effective depth. Effective depth = overall depth – effective cover.
How do you calculate the effective span of a slab?
Assume the thickness of slab (take 4 cm per metre run of the span). Find the effective span which is lesser of (i) distance between centres of bearings, and (ii) clear span and effective depth. Find the dead load and the live load per square meter of the slab. Determine the maximum bending moment for a one meter wide strip of the slab.
How do you find the effective span of a beam?
The effective span of the beams are taken as follows: The effective span of a simply supported beam or slab is taken as least of the following: Clear span plus the effective depth of beam or slab. Centre to centre distance between supports.
What is clear cover and effective depth for simply supported slab?
Clear cover is the distance from circumference of main bar to the edge of the slab. For a simply supported slab the effective depth is the actual distance between top edge and centre of main bar ar the bottom of the slab. Dwayne is in hot water for his latest comments.