| CPC B65G 1/0478 (2013.01) [B65G 1/0464 (2013.01); B65G 2207/20 (2013.01); B65G 2207/30 (2013.01)] | 15 Claims |

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1. A grid framework structure for supporting a load handling device operative to move one or more containers in a stack, said grid framework structure comprising:
a plurality of upright columns lying in a vertical plane and arranged to form a plurality of vertical storage locations for containers to be stacked between the upright columns and be guided by the upright columns in a vertical direction;
the plurality of upright columns are interconnected at their top ends by a first set of grid members extending in a first direction and a second set of grid members extending in a second direction, the second set of grid members running transversely to the first set of grid members in a substantially horizontal plane to form a grid having a grid structure that includes a plurality of grid cells or grid spaces;
the first and the second sets of grid members include a first set of tracks and a second set of tracks arranged respectively for a load handling device to move one or more containers on the grid framework structure;
a sub-group of upright columns rigidly joined together by at least one bracing assembly having a plurality of diagonal braces to form a braced tower; and wherein:
the sub-group of upright columns includes three upright columns lying in a same plane such that two of the three upright columns are laterally disposed either side of a middle upright column, the two laterally disposed upright columns being rigidly connected to the middle upright column by the plurality of diagonal braces;
the middle upright column includes a plurality of joining plates spaced apart along a longitudinal length of the middle upright column, each joining plate occupying a respective slot extending through the middle upright column in a horizontal direction parallel to a plane in which the three upright columns lie; and
the plurality of diagonal braces are connected to the middle upright column via the plurality of joining plates.
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