architecture

1. Design and drawing of RC Structures
1

2. 2
 Symbols
Symbols Relating to Shape of the Bar along its
Lengths
Alt Alternate bar
Bt Bent bar
B Bottom bar
min Minimum
max Maximum
St Straight bar
Stp Stirrup
Sp Spiral
Ct Column tie
T Top bar

3. 3
 Symbols
Symbols Relating to Position and Direction
EW Each way
@ Spacing centre-to-centre
Limit of area covered by bars
Direction in which bars extend

4. 4
Symbols Relating to Various Structural Members
Bm or B Beams
Col Column(s)
Fg Footing(s)
GR Girders
JT Joints(s)
LL Lintel(s)
LB Lintel beam(s)
Sb or S Slab(s)
WL Longitudinal wall
Wx Cross wall

5. 5
 Graphical Symbols

6. 6
 Graphical Symbols Contd.

7. 7
 Graphical Symbols Contd.

8. Structural Lay-Out Drawing
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• Positioning and orientation of columns
• Positioning of beams
• Spanning of slabs
• Layout of stairs
• Selecting proper type of footing

9. Structural Lay-Out Drawing
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• Two axes marked one side with alphabets and the other
with numbers.
• Columns are marked at the intersection of grids
• Beams are marked using two parallel lines
• Slabs are indicated either as one way or two way

10. Structural Lay-Out Drawing:
Column & Footing
10
A
B
C
D
1 2 3 4

11. Structural Lay-Out Drawing
11

12. Structural Lay-Out Drawing
12
A
B
C
D
1 2 3 4

13. Structural Lay-Out Drawing
13