expanded configuration the support substructure 153 of the device 100 is designed to provide additional stability for the device 100 in this configuration beyond that provided the landing legs 115 the embodiments of the expandable storage and metering device 100 disclosed herein may be used in any type of application operation or process including well fracturing cementing and drilling operations for which it is desired to provide material at a specific rate as one illustrative example fig6 schematically depicts a well fracturing operation 600 wherein one representative expandable storage and metering device 100 is used to provide sand 605 at a desired rate to produce a fracture fluid 630 the device 100 which may be any one of the previously described embodiments is positioned at a well fracturing job site expanded to maximize its internal volume and then loaded with enough sand 605 to complete the fracturing job or to capacity if the amount of sand 605 required for the job exceeds the storage capacity of the device 100 in the latter scenario the device 100 may be refilled one or more times during the fracturing process until the process is completed at the well site the expandable storage and metering device 100 is attached to or positioned proximately to a gathering conveyor 610 sand 605 stored in bins 200 of the device 100 is metered out at a desired rate onto the primary conveyor 125 the sand 605 is then transported first by the primary conveyor 125 and then by the elevating conveyor 135 to the gathering conveyor 610 the gathering conveyor 610 transports the sand 605 to the blending system 615.