While the originator of the adage “measure twice, cut once” likely didn’t have diffused aeration in mind, it is just as true in wastewater tank dimensions as it is in carpentry.
During the initial design phase, approximate dimensions are sufficient. However, when it comes to the final design details are extremely important. Obviously, the length, width, and depth of the tank are all imperative, but other dimensions are also significant including:
In a highly competitive bid environment, manufacturers are counting washers to try to provide their best price. Accurate dimensions create the best outcome for all parties: owners/engineers get the best possible price, contractors receive a system that will fit in the tanks correctly, and manufacturers do not end up with unforeseen equipment modifications during submittal, or worse, after fabrication.