What is the proper spacing for U-Boats?
This is asked very often. U-Boat spacing is as follows: Joist Spacing = 24” o.c.* = U-Boat spacing 16” o.c. along the joist minimum and not to exceed 24” o.c. Joist Spacing = between 12”-16” o.c. = U-Boat spacing 16” o.c. along the joist minimum and not to exceed 32” o.c. Most (>99%) of applications will work fine with 16” o.c. spacing of U-Boats along the joist. Spacing further apart will improve low frequency isolation below 40 Hz. However, spacing should never exceed 32” o.c. *o.c. stands for ”on center” and represents measuring spacing from center-to-center of, say, joists or studs (or U-Boats). This is to prevent confusion caused by sometimes erroneously measuring from edge to edge.
