Are twin slot brackets strong enough to support a shelf layout?

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Twin slot upright The pitch for the wall fixing holes on the product is 220mm Thervertical pitch is 32mm The length of the upright is 2426mm

Newtech Twin Slot Upright - 1000 x 25mm Our Twinslot shelving system offers simple, wall-mounted uprights with two holes so that the same upright can be used to hold shelving to each side

yy777 slot Our Twinslot shelving system offers simple, wall-mounted uprights with two holes so that the same upright can be used to hold shelving to each side  Our Twinslot shelving system offers simple, wall-mounted uprights with two holes so that the same upright can be used to hold shelving to each side