I have a 1200 sq foot ranch with a full basement built in 1957. The floor joist are 2 x 8 dimensional lumber and they span 12 ' 8". In the center of the house about six in a roll have had failures. One because the plumbers cut
a 4 inch square hole to run the tub drain. The joist beside this one was cut in half so the hvac guys could run the furnace vent to the roof thru the bath closet. The remaining four joist have failed due to large knots in the lumber that have cracked. Some time in the past someone added some angle iron to repair these joist but it was poorly fastened. Today I removed the angle iron and plan to saddle new 2x8's beside the damaged ones. Anyone have a suggestion as to the the type of fasteners (nails, screws or bolts) and how many to mate the old and new together ? Clearance is minimum in some areas. As luck would have it all these joist are over my electric panel and
water heater and I have had to pull the wiring and plumbing for access.
I'm considering 3 inch nails paired or tripled every 16 inches.
Stuart
a 4 inch square hole to run the tub drain. The joist beside this one was cut in half so the hvac guys could run the furnace vent to the roof thru the bath closet. The remaining four joist have failed due to large knots in the lumber that have cracked. Some time in the past someone added some angle iron to repair these joist but it was poorly fastened. Today I removed the angle iron and plan to saddle new 2x8's beside the damaged ones. Anyone have a suggestion as to the the type of fasteners (nails, screws or bolts) and how many to mate the old and new together ? Clearance is minimum in some areas. As luck would have it all these joist are over my electric panel and
water heater and I have had to pull the wiring and plumbing for access.
I'm considering 3 inch nails paired or tripled every 16 inches.
Stuart