Construction workers noticed that the beam had moved out of place on one of the two 3,500 capacity stands under construction.
An emergency inspection was carried-out on both stands and work stopped for a week while the problem was identified and fixed.
A site source told the Manchester Evening News: “Somebody noticed that the steel on one of the stands had twisted.
“Work was called off straight away and a cordon was put around it while they figured out what was going on.”
A Lancashire County Cricket Club spokesman said: “A steel connection in one of the new grandstands had failed. It has now been inspected and a solution has been put in place which involves removing sections of concrete from the stand to replace it.
“At no point was the health and safety of the workforce compromised and it has had no adverse effect on the build programme.”
A spokesman for Morgan Sindall said: “We have conducted a thorough inspection of both stands which are under construction and this has confirmed that it is an isolated issue.
“There is no effect on the overall build schedule with both stands on target to be completed this summer.”