The structural form of the reinforced chord is similar to the upper and lower chords of the truss unit. The connection size of 321 is 3000mm in length, and the connection size of 200 is 3048mm. It is mainly used to strengthen the upper and lower chords of trusses of standard bridges or special bridges. The reinforced chord is provided with two rows of upper and lower connecting supports, the lower row is convenient for connecting with the truss chord, the upper row is convenient for connecting with the support frame, and the upper truss unit of the female bridge end and the male bridge end is usually not equipped with reinforced chords. Usually the reinforcing chord is set directly opposite to the truss element. The 200 type can also stagger the single and double ear joints of the reinforced chord and the single and double ear joints of the truss unit.
The 321 type reinforced chord weighs 80 kg; the 200 type reinforced chord weighs 90 kg.
1 To Increase the bailey bridge strength
2 Bailey Bridge Component
3 Connected on the panel with bolts
Span Construction-Load Table --- Extra Single Lane (W=4200mm) | |||
SPAN-ft | HS-15 | HS-20 | HS-25 |
30 | SS | SS | SS |
40 | SS | SS | SS |
50 | SS | SS | SS |
60 | SS | SS | SS |
70 | SS | SS | SSR |
80 | SS | SSR | SSR |
90 | SSR | SSR | SSR |
100 | SSR | SSR | SSR |
110 | SSR | SSR | DS |
120 | SSR | DS | DSR1 |
130 | DS | DSR1 | DSR2H |
140 | DSR1 | DSR2H | DSR3H |
150 | TSTSR2 | DSR2H | DSR4H |
160 | DSR2H | DSR2H | TSR2 |
170 | TSR2 | TSR2 | TSR3 |
180 | TSR2 | TSR3 | TSR3H |
190 | TSR3H | TSR3 | QSR4 |
200 | QSR4 | TSR3QSR3 | QSR4 |
Span Construction-Load Table --- Double Lane (W=7350mm) | |||
SPAN-ft | HS-15 | HS-20 | HS-25 |
30 | SS | SS | SS |
40 | SS | SS | SS |
50 | SS | SS | SSR |
60 | SS | SSR | SSR |
70 | SSR | SSR | DS |
80 | SSR | DS | DSR1 |
90 | SSRH | DSR1 | DSR2H |
100 | DSR1 | DSR2H | TSR2 |
110 | DSR1 | DSR2 | QS |
120 | TS | DSR2H | TSR2 |
130 | DSR2H | TSR2 | TSR3 |
140 | TSR2 | TSR3 | TSR3H |
150 | TSR3H | TSR3H | QSR4 |
160 | QSR4 | QSR4 | QSR4 |
170 | QSR4 | QSR4 | |
180 | QSR4 | ||
1.SS shows one range one tier; DS shows two ranges one tier; TS shows three ranges one tier; DD shows two range two tiers etc. | |||
2.If R follows SS, DS, DD, etc, means reinforce type,and R1 means only one range reinforced, R2 means two ranges reinforced etc. |