Positioning of Irc Live Loads:: Coventions Used Below Are in Reference With The Above Figure
Positioning of Irc Live Loads:: Coventions Used Below Are in Reference With The Above Figure
Positioning of Irc Live Loads:: Coventions Used Below Are in Reference With The Above Figure
BRIDGE WIDTH
Coventions used below are in reference with the above figure SPAN OF BRIDGE Reaction for maximum moment @ T-T axis MT: (a) Single Lane of IRC Class A
Longitudinal placement :
Braking force 6.8t 3.0m 6.8t 3.0m 6.8t 3.0m 6.8t 4.3m 11.4t 11.4t 11.4t 1.2m 3.2m Braking force 2.7t 2.7t
1.1m
span
B C
span
Transverse placement :
Centre Line carriageway 0.4m 1.8m
CG
4.20
(b)
Transverse placement :
Centre Line carriageway 0.4m 1.8m 1.7m 1.8m
CG 5.5m
e=2.45m
2.45
(c)
Transverse placement :
Centre Line carriageway 0.4m 1.8m 1.7m 1.8m 1.7m 1.8m
Transverse Eccectricity
0.70
(d)
Longitudinal placement :
1.37m 2.13m
span
B C
span
Transverse placement :
Centre Line carriageway 1.63m 1.93m
CG
Transverse Eccentricity
2.905
(e)
Transverse placement :
Centre Line carriageway 1.63m m Class 70R 1.93m 1.88m Class A 1.8m
CG:100t 5.5m
CG:55.4t
Reaction for maximum moment @ L-L axis ML: (a) Single Lane of IRC Class A
Braking force 2.7t 2.7t 1.1m 11.4t 11.4t 11.4t 3.2m 1.2m 4.3m Braking force 6.8t 3.0m 6.8t 3.0m 6.8t 3.0m 6.8t
Longitudinal placement :
span
B C
span
(b)
Transverse placement :
1.37m
span
B C 0.4m
span
*Reactions for abutments have been tabulated by taking RC reactions for various loading conditions. **In this case live load effects have been reduced by 10% to account for the additional third lane. Refer IRC: 6-1966 Clause 208.2