I'm installing a 36"x36" shower base in a bathroom I'm remodeling and the drain is directly over a 2"x10" floor joist. I know I'll have to notch the joist, but I need to know the best way to do that and do the least amount of damage. The drain itself will be less than 2 feet from the sill plate, so I'm pretty sure if I marry another 2"x10" to the notched beam it should keep it from flexing. I know I'm not the only person who ever ran across this problem so any help would be appreciated. Thanks.