Mechanical Stess strain strength calculation of Welded Bracket and Fasteners

Welded steel bracket having a by a Roller ...which has a motion attaching over the rails.There will be a reaction force of the rails over to the rollers which might withstand the fastener bolts or not is to be calculated.
Please check the attachment and direct message me if you find eligible to do the strength calculation.

Members belongs to Strength of material/ Machine design / Structural analysis and design