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Download free technical documents from the CEMA community. Safety Program; Including safety labels and guidelines, posters, videos, and more resources. Statistics; Events; Newsroom; Member Login; CEMAstore ; Technical Downloads. Home; Technical Downloads; All Technical Downloads Whitepapers Unit/Bulk Handling Safety Chain & Sprocket Screw Conveyor Bulk Belt Accessories CEMABelt Conveyors for Bulk Materials - CEMA,89 Belt Tension Calculations W b =weight of belt in pounds per foot of belt length. When the exact weight of the belt is not known, use average estimated belt weight (see Table 6-1) W m =weight of material, lbs per foot of belt length: Three multiplying factors, K t , K x , and K y , are used in calculations of three of the components of the effective belt tension, TBelt Conveyors for Bulk Materials Calculations by CEMA 5,,Belt Widths The belt widths are as follows: 18, 24, 30, 36, 42, 48, 54, 60, 72, 84, and 96 inches. The width of the narrower belts may be governed by the size of lumps to be handled. Belts must be wide enough so that any combination of prevailing lumps and finer material does not load the lumps too close to the edge of the conveyor belt.