I need to run 2" ABS through several joists. Assuming my 2x8 joists are actually 7.5 inches tall, this allows me to drill holes 2.5 inches in diameter (1/3 joist). Is this big enough to accommodate 2" ABS?
If so, assuming it needs to slope at 1/4" per foot, I figure my longest run could be 4 feet between joists. Here is how I came up with that number.
7.5" joist.
Can't bore holes within 2 inches of top or bottom leaves 3.5"
Hole is 2.5 inches.
3.5 minus 2.5 = 1 inch of slope to work with.
1 divided by 4 is 1/4"
Sound right?
My joists are 16" o.c. Does this mean 3 joists would be the max I could drill through? (48" divided by 16" = 3)
Is there anyway to extend this? 4 feet is not nearly long enough to get my shower drain to the main stack. It's probably closer to 8 feet.
Thanks
If so, assuming it needs to slope at 1/4" per foot, I figure my longest run could be 4 feet between joists. Here is how I came up with that number.
7.5" joist.
Can't bore holes within 2 inches of top or bottom leaves 3.5"
Hole is 2.5 inches.
3.5 minus 2.5 = 1 inch of slope to work with.
1 divided by 4 is 1/4"
Sound right?
My joists are 16" o.c. Does this mean 3 joists would be the max I could drill through? (48" divided by 16" = 3)
Is there anyway to extend this? 4 feet is not nearly long enough to get my shower drain to the main stack. It's probably closer to 8 feet.
Thanks