RESTRAINED TWOWAY SLAB (CORNERS HELD DOWN)Experiment No:-11

 

Experiment No:-11

 

RESTRAINED TWOWAY SLAB (CORNERS HELD DOWN)

Aim:-

Draw to a suitable scale section along short span, section along long span, top plan and bottom plan of reinforcement of a restrained two-way R.C.C. slab from the following data using AutoCAD software

Problem

The following are the particulars of a Simply supported two way slab and in which corners are held down.

Size of room = 4.5 m X 6.0 m

Thickness of slab = 180 mm

Bearing of walls = 150 mm

Reinforcement:

1.     Parallel to shorter span :

a.      Middle strip = 10 mm ф @ 145 mm c/c

(with alternate bars bent-up at 775 mm from edge of slab)

b.     Edge strips = 10 mm ф @ 229 mm c/c

2.     Parallel to longer  span :

a)     Middle strip = 10 mm ф @ 180 mm c/c

(with alternate bars bent-up at 900 mm from edge of slab)

b)    Edge strips = 10 mm ф  360 mm c/c

(Both top and bottom : 1060 mm from edge of slab)

3.     Torsion reinforcement :

a)     10 mm ф bars @ 145 mm c/c parallel to shorter span.

b)    10 mm ф bars @ 180 mm c/c parallel to longer span.

Anchorage and curtailment of reinforcement may be adopted with standard values and any more data required may be assumed suitably.

Draw the following views to a suitable scale.

1. Section along shorter span middle strip showing reinforcement details

2. Section along longer span middle strip showing reinforcement details.

3. Plan showing arrangement of reinforcement at bottoms.

4. Plan showing arrangement of reinforcement at top.

5. Prepare a bar bending schedule.

 

Procedure:

1. switch on the computer

2.Open Auto CAD 2014

3. Setting units

( ii) set the unit as decimal & millimeter

4. Setting limits

5. Zoom – All

6. Using Line command Restrained two way slab (corners held down) are drawn.

7. using hatch command where our necessary

8. Dotted lines are drawn using line type.

Result:

Thus the Restrained two way slab (corners held down) are drawn using Auto CAD 2014 software

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