If you are in the process of building your own home, then quality control is most likely an issue that you are going to take very seriously. And even more importantly, when you are at the framing stage of construction, which is the structure and integrity of your entire house, it is going to be very important to do a strict quality control process and go through every detail with a fine comb. After all, it is YOUR home that you will be living in, and you need to make sure it is of a quality that will last you and your family for many years to come.
Cutting & Nothing Standards – Studs
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diagram on how much stud you can notch in a frame
Notches in studs are restricted to 25% (1/4″) of the stud width at exterior walls and at interior load-bearing partitions. Notches may be 40% of the stud width in non-loadbearing partitions.
- Holes bored in studs may be as large as 60% of the stud width at interior non-bearing partitions and where studs are doubled. Not more than two successive double studs may be bored at that size. In all other studs, hole size is limited to 40% of the stud width. In any case, holes must not be near any other cut or notch.
Cutting & Notching Standards – Joists & Rafters
- The notching of ceiling and floor joists is not permitted (Exception: end notches for hanging joists on a ledger board)
- Nothing at the extreme ends may not be more than 1/4 the joist depth.
- Holes bored in joists or rafters must not exceed 1/3 the depth of the member and must not be closer than 2 inches to the top or bottom edge of the member.
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- diagram of boring a hole in a framing stud
{ 2 comments… read them below or add one }
How hard is it to “sister” floor joists or is it something a reasonably skilled home handy man/woman could do without breaking the bank? We are looking to buy a 90 year old house and a home inspection has revealed that several of the floor joists in the basement have had foot long lengths removed or have been heavily notched to allow ducting to go through and one of them is to split. The engineer we had come out said that the joists were not super bad but simply needed to have sister joists put on to stop things getting worse. There is only ever so slight uneveness in the floor above in one room, and well within “its an old house” tolerances and the engineer did not think it was a problem so we would not need to jack up or re level anything just put in the sister joists and reroute about a metre of ducting. The person we are buying from is dithering about getting the repair done as she has over invested in the place and having seen other repairs they have done we worry about…
obviouslly cross bracing between the joist is also missing.The joists need to be tied together perpendicalarly. This will help transfer load to the adjoining joists.