Search the forum,

joist

A joist is a horizontal structural member used in framing to span an open space, often between beams that subsequently transfer loads to vertical members. When incorporated into a floor framing system, joists serve to provide stiffness to the subfloor sheathing, allowing it to function as a horizontal diaphragm. Joists are often doubled or tripled, placed side by side, where conditions warrant, such as where wall partitions require support.
Joists are either made of wood, engineered wood, or steel, each of which have unique characteristics. Typically, wood joists have the cross section of a plank with the longer faces positioned vertically. However, engineered wood joists may have a cross section resembling the Roman capital letter "I"; these joists are referred to as I-joists. Steel joists can take on various shapes, resembling the Roman capital letters "C", "I", "L" and "S".
Wood joists were also used in old-style timber framing. The invention of the circular saw for use in modern sawmills has made it possible to fabricate wood joists as dimensional lumber.

View More On Wikipedia.org
Recent contents Top users
  1. D

    Shower tray waste exits onto joist, help!

    First time poster, be gentle! I've positioned an offset quad shower tray and find that the waste is exiting directly onto one of the joists in the floor (first floor). Moving the tray (low profile) is not an option, what does one do? Is it safe to cut a chunk out of the joist? Many...
  2. T

    ticking noise

    debating with architect today about the source of the dreaded ticking noise we can experience on ch installs. is it A) unclipped pipes B) pipes too tight in notched joist/ too close to underside of flooring
  3. M

    Passing pipes under floors

    Hi guys. Just wanting to know how you lot pass your pipes under the floor boards? Do you clip them to the sides of the beams? Or put noggins in? Do you take the floor boards up at certain distances? What about if you need to run a 22mm pipe and notch but the beams are 180mm thick? Also, do...
    • mutley racers
    • Thread
    • 10mm 22mm bosch cable ceiling costs electricians floor floors hammer hose joist passing pipe pipes plumbing problem tee tools under wall
    • Replies: 10
    • Forum: Plumbing Jobs | The Job-board
  4. M

    Strange pipe securing onto joists

    Dear all, After getting fed up with the noisy pipes, i decided to rip open the floorboards and i noticed something unususal. There are 2 places in my house where i notice the "thud","tick tick" noises come from. When floorboards opened, i notice that the pipes are sitting fine on the cut...
    • manorpurl
    • Thread
    • flood installation insulation joist joists merchants noise noisy noisy pipes pipe pipes plumbers plumbing stock strange tools
    • Replies: 6
    • Forum: Plumbing Jobs | The Job-board
  5. D

    bathroom

    hello . i am refitting my bathroom suite . i have some practical knowledge of plumbing but one thing does fail me and you will be excused for laughing.i want to route pipe work for bath and sink below floor boards because at the moment everything is a bove and looks a mess , but i need to know...
  6. U

    puting your foot in it

    removed a bathroom suite and a shower cubical some of the floor boards had rotted and others had been chopped up before and placed back i stood on one of the boards and it slipped of the joist and my foot and half my leg went through the kitchen ceiling the customer asked if she had been hurt...
  7. K

    Waste through joists

    Fitting a shower tray directly onto 9'' x 3'' joists. Am I OK taking the 1½'' waste through the joists to couple to existing waste pipe. Sound advice much appreciated.
    • koibloke
    • Thread
    • 18mm 40mm advise basin bath building building regs ceiling comparison confused difficult drilling fitting glue job joist joists pipe problem safe screw shower shower tray size soil soil pipe through wall waste waste pipe wide
    • Replies: 25
    • Forum: Plumbing Jobs | The Job-board
Creating content since 2001. Untold Media.

Newest Plumbing Threads

Tiling Advice
DIY Talk
Tiling Blog
Tilers' Talk
Tiling Forum UK
Back
Top
AdBlock Detected

We get it, advertisements are annoying!

Sure, ad-blocking software does a great job at blocking ads, but it also blocks useful features of our website. For the best site experience please disable your AdBlocker.

I've Disabled AdBlock