We are very particular about how these go together because we see so
many broken and cracked weld battery hold downs, and most of the broken
ones weren't cheap either.....The real problem we have found with the
easily broken ones was multiple welds on too thin material, some are
only 20 gauge.....They simply can't take the vibration.
We followed the form of our single battery boxes and made these with
very close tolerances so they didn't have to be too thick of material
because if it fits well it won't be bouncing around. So we use 12 gauge
(about 1/10" thick) and MIG the center tab, that should avoid the
vibration cracks around the welds the rest are so famous for. This is our side by side lengthwise model.
Each battery has a hold down in the shape of the newer battery top (if
you have an older Optima they will still fit). We do not predrill any
holes for mounting because you will want to mount them for YOUR vehicle
and not have to work around someone else's idea of what is right. They
can be bolted of welded in but remember that batteries are heavy.
The dimensions of this box are 20" X 7 1/8".