Aisle containment system for data centers

An upper portion of an aisle containment system for a data center configured to be attached to a lower support assembly of the aisle containment system to form the aisle containment system, the upper portion comprising:

• spaced vertical supports aligned in two parallel rows, the two parallel rows defining two longitudinal sides of the upper portion;
• spaced horizontal supports that extend between and are attached to the spaced vertical supports;
• at least one pair of arms (1) attached to the vertical supports or the horizontal supports and (2) configured to support services;
• and
• at least one busbar casement;
• wherein:
• one arm of the at least one pair of arms extends outwardly from each of the two longitudinal sides of the upper portion;
• each arm of the at least one pair of arms includes at least one segment having a first position in which the at least one segment is substantially parallel to the vertical supports and a second position in which the at least one segment is substantially perpendicular to the vertical supports;
• the at least one busbar casement is fixedly attached to the vertical supports and extends substantially parallel to the two longitudinal sides of the upper portion, substantially a length of the upper portion.