For concrete pumping, coarse aggregate is generally limited to no more than one-third of the pipeline diameter. That makes the impact of aggregate size on concrete pumping a practical mix-selection issue: particles that are too large for the line can disrupt flow and increase the risk of a blockage....

What if the biggest disruption from a 10-year boom inspection isn’t the inspection itself, but not knowing what to prepare for? The scope can vary with the boom, its history and applicable guidance, so planning ahead helps you organise records, arrange access and prepare for possible follow-up work....