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Two boards nailed together for strength. Over a door or window opening, two 2x12 with a piece of 1/2 inch plywood in between for a header.

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Q: What is a double joist?
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What are the ends of the joist nailed too?

Floor joist or ceiling joist? Floor joist have a board on the end all the way along the side of the building called a rim joist. Like the cross bar on the top of a T. Ceiling joist are nailed down into the top plate of the wall and to the rafters where possible.


What can be a word sentence of joist?

A joist is a beam, a supporting structure in a building. The roof joist was riddled with dry rot and had to be replaced.


How much weight can you put on a floor joist?

it depen on the size of the joist


What size nail should be used to attach the band joist to a joist when end nailing?

A 20 delta size nail should be used to attach the band joist to a joist when end nailing. A 16 D can also be used.


There is a 2 by 8 running the whole length of your celling and right where your new skylights are can you cut it and sister it to the roof?

No. You need to support it, cut it and use 2 x 2x8s to tie back into the two joists next to it on each end. Use double joist hangers. By code you would also have to double the joist (s) you installed the hangers on... That is not always possible.


How do you repair a sagging ceiling joist?

There are several ways, but probably the easiest way would be to temporarily buck under the afflicted ceiling joist with a 2x6 temporarily, until the joist is in line with the others. Then go into the attic and cut and attach a 2x6 to the joist and vertically to the roof ridge. Remove the buck. The joist should stay in place.


Does a joist note giving size spacing and direction and shown on a floor plan pertain to the framing above or below?

A joist note on a first floor plan would refer to the Joist below that floor, a joist note on the third floor plan woud be for that floor.


How do you repair deck joists on a cantilever deck?

Not knowing if the joist are in need of repair from rot (deterioration) or broken/damaged then replace ment of joist may be necessary. First get a replacement joist of the same or better species and treatment content and dimensions as the existing joist. Then cut the joist to the same length. You may have to cut a small angle on the bottom end of the joist to aid in working it over and between the girts and decking boards. Work the joist within a few inches of the joist to be replaced. Use a short 4x4 to drive the joist or a wood block to strike with a hammer. Take a couple of scrap 2x's and temporarily fasten to the girts and new joist to prevent movement. Then you may try a couple methods to remove the old joist. If the decking is fastened with screws then simply backout the screws. If it is nailed, then a 10 lbs. hammer can often remove most anything you need and is a great stress reliever but I recomend you use a reciprocating saw to cut the fasteners between the joist and decking. Usually the vibration of the saw and nails being cut will loosen the deck side of the fasteners and allow you to go top side and pull the old nail halves out. Once the old joist and fasteners are out you can carefully work the new joist in place. I recommend fastening the old decking to the new joist with properly coated screws or a hotdipped galvanized rink shank nail. Repeat joist replacement as necessary on other joist.


What does the word joist mean?

Joist = one of the parallel pieces of timber to which the boards of a ceiling or floor are fastened


Are the nails used by air framing hammers as strong enough for framing floor joist?

No,if the joist is merely butted.The joists must sit on a bearer type of situation or have joist-hanger connectors.


What is a timber joist?

A joist, either floor or ceiling are the boards that go across the building and tie the walls together. A timber joist would be a rough sawn beam. Basically a tree that has been squared up.


What is the shallowest joist any type 16 or 12 oc that will span 14' in a residential house ll 40psf to replace badly damaged 6 wood joists?

You are pushing it with a 2 x 8. 2 x 10 would be better. Make sure you double any joist supprting the roof.