The consideration of the rafter tie direction and subsequent placement of the attic stair location may very well place some constraints on where the stair opening can be located. That may end up placing it in the ceiling of a bedroom for example.
Another thing to consider is to make sure that you are able to orient the attic stair so that it comes up at its top in a location that has plenty of head clearance under the rafters. This may very well mean that the top of the attic stair needs to face toward the center of the building structure where there is the greater overhead clearance to the rafters.
Similar to paul's answer to your first question, but some additional information taken from this:. Sign up to join this community. The best answers are voted up and rise to the top. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Learn more. Cutting ceiling joist for attic ladder install Ask Question. Asked 3 years, 2 months ago. Active 7 months ago. Viewed 16k times. Before I do can anyone help me answer the following questions: 1 Can the joist be cut to make room for the attic ladder.
Improve this question. Can you orient the unit in line with the joists rather than cutting through multiple joists? Add a comment. Active Oldest Votes. Note that the trimmers run the whole length of the joists in place. Improve this answer. Can waste pipe go through joist? The maximum allowable diameter of a hole in any solid-lumber joist is one-third of the joist's depth.
How can I strengthen my joists? As incremental parts of a building's structure, joists are not easily replaced. You can, however, strengthen the joists by securing another length of wood to the existing joist, called "sistering," or reduce wobbly floors with block inserts between the joists, called "blocking. How long can a joists be without support? Joist Spans A live load of 60 pounds per square foot demands more support and shorter spans. Spaced at 12 inches, the joist may only span 16 feet 8 inches.
At 16 inch spacing, 15 feet 2 inches and 13 feet 3 inches at 24 inch spacing. Can you notch bottom of joist? Before you start work check that the joist size is adequate for the span. Notches can only be made in the top OR bottom of the joists, not both within the permitted area to a maximum of 35mm.
Holes may only be made on the joist's centreline within the permitted area to a maximum diameter of 65mm. How do I strengthen my floor joists with plywood?
How to Reinforce Joists with Plywood Measure the distance from the bottom of the floor to the bottom of the joist. Do not cut through the drywall. Remove the cut joist s. Measure the distance between the full joists on either side of the cut joists. These are trimmer joists. Always measure, however, because there can be slight variations in the layout. Cut two boards to make single headers if you removed one joist, and cut four boards to make double headers if you removed two joists.
Cut the headers from the same dimension of lumber as the joists. For example, if the joists are 2-by-6s, the headers should also be 2-by-6s. Position a header between the remaining joists and at a right angle to both. Slide the header so the side fits snugly against the remaining stub of the cut joist. Fit a framing nailer with 16d nails and insert two nails, evenly spaced, through the header into the end of the joist stub. Reach around the outside of the full remaining joist on one side and shoot two more nails through the joist and into the end of the header.
Repeat on the other side of the header. Attach another header on the other side of the opening in the same way.
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