open web girder

open web girder

1. Krishnakumar
1304300020
Civil Engineering(final year)
BundelkhandInstitute of Engineering and
Technology, Jhansi
Open web girder

2. content
•1 What is OWG?
•2 Uses
•3 Types
•4 Merits/demerits
•5 Fabrication
•6 Conclusion

3. What is OWG?
A open web girder (OWG) is the Structure in which web
part
is partially vacant.
Open web
Closed web

4. On site

5. Why we use
Girdercan not prefer for very large span.
b/w lateral load come in picture.
Thus to overcome transverse force we
remove some portion of web part with the
structural engineering.
For ex –all railways follow O.W.G.
concept.

6. SALIENT FEATURES
Weight of girder –65 MT
Overall length of girder –32.460m to 76m
Effective length of girder –31.926m to 72.0 (c/c of Bearings)
Height of girder –7.637m (use)
Width of girder –5.760m

7. Old v/s New
Old Present
20 to 25 m
35 m to 71m
truss

8. Merits /demerits
No intermediate column require.
Light weight.
Provide direct support for roof or floor
deck.
Very less vibration.

9. Fabrication
Acetylene paint

10. Uses
Used for track bridges over large
rivers.
On sea
> To support roof.
>To support floor.

11. Cont.
Valleys crossing.
Combination of cable and OWG

12. In present days application of OWG is
very wide.
Most economical way of support.

13. much
obliged…