Belt Conveyors for Bulk Materials Calculations by CEMA 5 ...
2014-1-21 · 1. Troughing idler load ratings (Tables 5.7–5.10) are for three equal length rolls. 2. Load ratings also apply for impact rolls. 3. Troughing idler load ratings are based on a load distribution of 70% on center roll and 15% on each end roll for all trough angles. 4. Unequal length rolls or picking idlers are not covered by this standard.