Inspectors also found workers had to enter a dust-collection silo referred to as a "bag house" to perform routine maintenance without the required confined space safety precautions being in place, so 13 of the serious violations involved confined space hazards.
They agreed to work together to share best practices aimed at lowering workers’ exposures.
The work was being done at Santa Rosa Beach, Florida.
The funding is part of the Face Forward Initiative.
More people are employed in Britain's private sector, 26.1 million, than ever before, new official figures from the government showed on March 16.
OSHA says the global retailer failed to protect employees from serious hazards. Proposed penalties total $118,800.
The program calls on employers to reduce the most common musculoskeletal, repetitive motion injuries.
The tower crane was in use on a housing development in Thessaly Road, Battersea, and its sections separated when 24 bolts failed due to metal fatigue.
"In case after case, the prompt reporting of worker injuries has created opportunities for us to work with employers we wouldn't have had contact with otherwise," said Assistant Secretary of Labor for Occupational Safety and Health Dr. David Michaels, author of OSHA's report.
Just four days earlier, construction workers and contractor personnel celebrated the building's topping out ceremony.