irrigation engineering

1. Structural engineering and irrigation
drawing

2. Singly reinforced beam
A singly reinforced beam has the following particulars.
• Clear span of beam—5 m.
• Wall thickness.300mm
• Cross section of beam --250 x450 mm.
• Clear cover to Stirrups—25mm.
• Beam --tension reinforcement: 3 Nos of 16 mm Φ with one of them bend
up at 0.15 leff.
• Stirrups -6mm Φ @ 100mm C/C up to 1m from centre of support and
remaining @ 125mm C /C.
• Draw (1) Cross section of the beam at centre and support. (10)
• (2) Longitudinal section (15)

3. Clear span of beam—5 m. Wall thickness.300mm
300 mm 300 mm
5000 mm
Cross section of beam --250 x450 mm.
Longitudinal section
Cross section
at the support.
Cross section
at centre
Clear cover to Stirrups—25mm.
Beam --tension reinforcement: 3 Nos of 16 mm Φ with one of them bend up at
0.15 leff.
Stirrups -6mm Φ @ 100mm C/C up to 1m from centre of support and
remaining @ 125mm C /C.
Stirrups 6mm Φ @ 100mm C/C
Stirrups 6mm dia @ 125mm C/C
Tension reinforcement: 3 Nos of 16 mm
Tension reinforcement: one bend up bar
250 mm
450 mm
450 mm
250 mm
450 mm
Scale 1:20
Scale 1:10
Scale 1:10
0.15 leff = 0.15 x 5.3

4. Doubly reinforced beam
A doubly reinforced beam has the following particulars.
• Clear span of beam—5 m.
• Wall thickness.300mm
• Cross section of beam --300 x500 mm.
• Beam --tension reinforcement: 4 Nos of 16 mm Φ
• compression reinforcement: 3 Nos of 16 mm Φ
• Stirrups -10mm Φ @ 200mm C/C
• Draw (1) Cross section of the beam at centre and support. (10)
• (2) Longitudinal section (15)

5. Clear span of beam—5 m. Wall thickness.300mm
300 mm 300 mm
5000 mm
Cross section of beam --300 x500 mm.
Longitudinal section
Cross section
at the support.
Cross section
at centre
Clear cover to Stirrups—25mm.
Beam --tension reinforcement: 4 Nos of 16 mm Φ compression reinforcement:
3 Nos of 16 mm Φ
Stirrups -10mm Φ @ 200mm C /C.
Stirrups 10mm Φ @ 200mm C/C
Stirrups 6mm dia @ 125mm C/C
Tension reinforcement: 4 Nos of 16 mm
Compression reinforcement 3 nos. 16 mm Φ
300 mm
500 mm
500 mm
300 mm
500 mm
Scale 1:20
Scale 1:10
Scale 1:10
0.15 leff = 0.15 x 5.3
Tension reinforcement: 3 Nos of 16 mm

6. • Length of the beam 2.5m

7. Cantilever beam
A cantilever beam has the following particulars.
• Span of beam—2.5 m.
• Column size 300 x 450 mm of rein. 6 – 16 mm Φ
• Cross section of beam --300 x600 mm. (fixed end) 300 x 300 mm (free
end)
• Bearing in column 450 mm
• Beam --tension reinforcement: 4 Nos of 16 mm Φ
• compression reinforcement: 2 Nos of 12 mm Φ
• Stirrups -8mm Φ @ 200mm C/C
• Draw (1) Cross section of the beam at fixed and free end. (10)
• (2) Longitudinal section (15)

8. 450 mm 2500 mm
Longitudinal section
Cross section
at the fixed
end.
Cross section
at the free
end
Stirrups 8mm Φ @ 200mm C/C
Stirrups 6mm dia @ 125mm C/C
Tension reinforcement: 4 Nos of 16 mm
Compression reinforcement 2 nos. 12 mm Φ
300 mm
300 mm
600 mm
300 mm
300 mm
Scale 1:20 Scale 1:10
Scale 1:10
Tension reinforcement: 4 Nos of 16 mm
300 mm
2500 mm
450 mm
300 mm
Plan showing main reinforcement section
Span of beam—2.5 m. Column size 300 x 450 mm
Cross section of beam --300 x600 mm (fixed end)
& 300 x 300 mm (free end)
Clear cover to Stirrups—25mm.
Beam --tension reinforcement: 4 Nos of 16 mm Φ compression reinforcement:
2 Nos of 12 mm Φ
Stirrups -8mm Φ @ 200mm C /C.

10. 200 mm
500 mm
Cross section of lintel with sunshade
Stirrups 6mm Φ
@ 200mm C/C
Main reinforcement: 8 mm Φ 200 mm c/c
Stirrup holder 2 nos. 6 mm Φ
50 mm
Scale 1:20
Scale 1:10
Distribution bars: : 6 mm Φ 250 mm c/c
300 mm
1500 mm
450 mm
200 mm
Longitudinal section of the lintel
Sunshade projection—50 cm. Depth lintel 200 mm
Wall thik:-200, opening width 1500 mm
Av. Thik of sundshade 75 mm
Lintel - tension reinforcement: 4 Nos of 8 mm Φ
Stirrups -2 legged 6mm Φ @ 200mm C /C,
Stirrups holder – 2-6mm Φ
Main reinforcement in sunshade 8 mm Φ @ 200 mm c/c & 6 mm dist. @ 25 mm clc
.
200 mm
100 mm
Main reinforcement 4 nos. 8 mm Φ

11. One way simply supported slab
Clear cover to Stirrups—25mm.
Size of room 1.5 m x 3.5 m. Wall thickness.220mm, Slab thickness-100 mm.
Main Bars 8 mm Φ mild steel @ 180mm C /C, alternate bars bent up.
distribution bars 6 mm Φ mild steel @ 200mm C /C
Draw a) plan
B) section along shorter span

12. 1.5 m
220 mm
220 mm
Main bar 8 mm Φ @ 180 mm c/c Alternate bar 8 mm Φ bent up @ 360 mm c/c
100 mm
Distribution bar 6 mm Φ @ 200 mm c/c
SECTION ALONG SHORTER SPAN
PLAN SHOWING THE REINFORCEMENT DETAILS
1.5 m 220 mm
220 mm
220 mm
220 mm
3.5 m
Main bar 8 mm Φ @ 180 mm c/c
Alternate bar 8 mm Φ bent up @ 360 mm c/c
Distribution bar 6 mm Φ @ 200 mm c/c

13. Two way simply supported slab
Clear cover to Stirrups—25mm.
Size of room 1.5 m x 3.5 m. Wall thickness.220mm, Slab thickness-100 mm.
Main Bars 8 mm Φ mild steel @ 180mm C /C, alternate bars bent up.
distribution bars 6 mm Φ mild steel @ 200mm C /C
Draw a) plan
B) section along shorter span

14. 1:9
1:6

15. BED ROCK 95.0 m
G L 100.0 m
FTL 111.5 m
DTL 114.5 m
105.0 m
1
1
1
1.4
1
9
1
6
102.0 m

16. Tank sluice with tower head

17. Foundation level 33.4 m (assume)
Tail channel level 34.0 m
Depth of Barrel 1.0 m
Still basin top 35.5 m
Wearing coat 33.9
Slab thickness 150 mm
Bund top level 40.0 m
1
2
2.5 m
bund level 35.0 m
Depth of Barrel 1000 mm
Revetment level 38.5 m
FTL 37.0
MWL 38.0
450mm

19. Bund
top
level
105.0
m
MWL
99.0
m
FTL
98.0
m
TOP
APRON
LEVEL97.0
m
1
2
1
2
Grouted
apron
600
mm
thick
Solid
apron
600
mm
thick
3
m
Size of cut off wall 600
mm x 900 mm
1000 m
1500 m
900 mm
750 mm
2000 m
24.6 m
15 m
PLAN (HALF PLAN AT BOTTOM & TOP
SECTION
ACROSS
BODY
WALL

20. Bund
top
level
1005.0
m
MWL
99.0
m
FTL
98.0
m
TOP
APRON
LEVEL97.0
m
1
2
1
2
Grouted
apron
600
mm
thick
Solid
apron
600
mm
thick
3
m
Size of cut off
wall 600 mm
x 900 mm
10
00
m
15
00
m
90
0
m
m
75
0
m
m
20
00
m
24.
6
m
15
m
PLAN (HALF PLAN AT
BOTTOM & TOP
SECTION
ACROSS
BODY
WALL
Bund top level 105.0 m
FTL 98.0 m
MWL 99.0 m
TOP APRON LEVEL97.0 m
TOP
APRON
LEVEL97.0
m
500 mm
750 mm 750 mm
500 mm
24.6 m
25.2 m
10 m
SECTIONAL ELEVATION

22. LEVEL 12.0 m
BTL 15.00 m
FSL 13.50 m
DROP WALL TOP LEVEL 12.00 m
ROP WALL BOTTOM LEVEL 8.60 m
BED LEVEL of D/S 9.0 m
TOP of D/S BANK LEVEL 12.5.0 m
LENGTH OF SOLID APRON 6.0 m LENGTH OF SLOPING GROUTED APRON 5.0 m
0.3 m
1.20 m
0.85 m
3.0 m
0.6 m
1.0 m
0.6 m
Water cussion
Notch pier
Sill stone
Bed pitching
60 cm thick
Bed pitching
60 cm thick

24. 1.2m 0.05 m
3.6 m 0.20 m
0.10 m
1.0 m
Inlet chamber
Outlet chamber
Baffle wall
SEPTIC TANK PLAN
SOAK PIT PLAN
1.2 m
1.2 m
SECTIONAL ELEVATION

26. Top level 14.5 m
GROUND LEVEL 10.0 m
Top level of base slab 9.5 m
Thickness of base slab 0.6 m
Top width 250 mm
Bottom width 600 mm
Toe projection1000 mm
Heel projection1800 mm
Stem main steel 16 mm dia @ 100 mm C/C
Alternate bars curtailed at 1/3 height from top
H/3
Distribution steel 12 mm dia @ 150 mm C/C
Temperature steel 10 mm dia @ 150 mm C/C
both direction
Toe and heel steel 16 mm dia @ 100 mm C/C