It's not a structural member (those will be steel I-Beams or square concrete pillars) and it's very thick-walled for a rising main, even for a skyscraper. Your guess that it's a concrete pump is a good one, although it's actually far too large a pipe for that: I think it's the central post of a pillar crane.
It's placed right by the street-level loading bay, and would be used as a dedicated crane for unloading equipment and materials. The big tower crane is used for moving materials around the site, and could probably do the job just as well, so the installation of a dedicated loading-bay crane suggests that it's a long project with a lot of materials and equipment to shift - that, or severe restrictions on the use of their on-street loading space.
no subject
The grey thing?
It's not a structural member (those will be steel I-Beams or square concrete pillars) and it's very thick-walled for a rising main, even for a skyscraper. Your guess that it's a concrete pump is a good one, although it's actually far too large a pipe for that: I think it's the central post of a pillar crane.
It's placed right by the street-level loading bay, and would be used as a dedicated crane for unloading equipment and materials. The big tower crane is used for moving materials around the site, and could probably do the job just as well, so the installation of a dedicated loading-bay crane suggests that it's a long project with a lot of materials and equipment to shift - that, or severe restrictions on the use of their on-street loading space.