COnbox: Side-by-side option

The side-by-side option in CONBOX allows you to apply the provisions of LRFD Art. 4.6.2.2.5 Special Loads with Other Traffic.

SBS: Side-by-Side live load responses use the following equations:

· LLRsp = LLRsp(PermitLL) * DF1/Z + LLRsp(DesignLL) * (DFm-DF1/Z)

Where,

· DF1 is the single lane distribution factor

· DFm is the multiple lane distribution factor

· LLRsp(Permit) is the live load response for the "permit" live load

· LLRsp(DesignLL) is the live load response for the "Design" live load

Since DF1 for LRFD includes a multiple presence factor, it needs to be removed; the Z factor accomplishes this since it is 1.2 for LRFD and 1.0 for LFD.

Thanks skan,

I'm modeling a concrete box girder bridge with multiple lanes. The live load is HL93 and P13 load. The P13 is allowed to load on one lane at most. Shall I define a HL93 load associated with a side-by-side P13 load which will be applied to strength II combo only?

If it is, then for other load combo, like strength I, Shall I use HL93 without associated with side-by-side P13 load?

Thanks skan,

I'm modeling a concrete box girder bridge with multiple lanes. The live load is HL93 and P13 load. The P13 is allowed to load on one lane at most. Shall I define a HL93 load associated with a side-by-side P13 load which will be applied to strength II combo only?

If it is, then for other load combo, like strength I, Shall I use HL93 without associated with side-by-side P13 load?