Concrete placing boom adapter

A support structure for supporting a concrete placing boom above a work site, the concrete placing boom including an extendable boom arm for placing concrete at a location remote from the support structure, the concrete placing boom including a mounting pedestal used to support the boom arm, the support structure comprising:

• a plurality of support masts each supported on and extending upwardly from a support surface, the plurality of support masts being spaced about the work site, each support mast having a cylindrical outer wall defining a generally hollow interior, the cylindrical outer wall being generally devoid of external projections;
• a single adapter removably attachable to each of the support masts, the adapter having a boom attachment portion for receiving the mounting pedestal of the concrete placing boom and a mast receiving portion for receiving one of the support masts, wherein the adapter can be moved between the plurality of support masts,
• wherein the mast receiving portion includes a mast receiving receptacle defined by a cylindrical outer wall, the mast receiving receptacle being sized to receive a top end of each of the support masts,
• wherein the adapter includes a mast supporting plate positioned to define a top end of the mast receiving receptacle, the mast supporting plate contacting the top end of the mast to which the adapter is mounted to support the adapter on the mast;
• and a central guide pin extending from the mast support plate, wherein the central guide pin is received in a central guide opening formed in the top end of each of the masts, and wherein the guide pin includes a tapered lower surface that is receivable in the central guide opening formed in the top end of each of the masts.

A support structure for supporting a concrete placing boom above a work site, the concrete placing boom including an extendable boom arm for placing concrete at a location remote from the support structure, the concrete placing boom including a mounting pedestal used to support the boom arm, the support structure comprising:

• a plurality of support masts each supported on and extending upwardly from a support surface, the plurality of support masts being spaced about the work site, each support mast having a cylindrical outer wall defining a generally hollow interior, the cylindrical outer wall being generally devoid of external projections;
• a single adapter removably attachable to each of the support masts, the adapter having a boom attachment portion for receiving one of the support masts, wherein the adapter can be moved between the plurality of support masts,
• wherein the mast receiving portion includes a mast receiving receptacle defined by a cylindrical outer wall, the mast receiving receptacle being sized to receive a top end of each of the support masts;
• a pressure coupling formed on the mast receiving portion for holding the adapter in contact with the outer surface of the mast to which the adapter is mounted, wherein the pressure coupling includes a plurality of adjustable screws each passing through the outer wall of the mast receiving receptacle, wherein the adjustable screws are each movable into contact with the outer surface of the support mast;
• and
• a strengthening plate formed on the interior of each support mast, the strengthening plate being aligned with the pressure coupling of the adapter when the adapter is attached to the mast.