A bubble level:If you’re working alone, a bubble level will help you measure straight lines when installing joist hangers.

Beam Configuration – Ledger to Beam, Free Standing (joists resting on beam), or Joist Hangers (joists attached to beam sides with hangers) Typically, going with 12-inch or 16-inch joist spacing is a safe bet for the project, but if you want to ensure the spacing is adequate for the project, use the following formula: There are so many variables and potential for error when calculating from scratch, that unless you’re a Structural Engineer tasked with the job, it’s better to use another method. My preference is to use span and spacing values readily available in Code tables or calculators. NZS 3604 also outlines many other requirements on joists such as fastenings, please refer to this document for more information. Erecting and spacing beams to allow shorter spans means less expensive and more readily available timbers may be used. It is better to go shorter than to try and maximize span bridging for a more solid and secure platform. Joist size determines span and spacing, so select the grade and type of wood best suited for your needs and budget.Wood treatment or joist tape:Be sure to apply wood treatment or joist tape to every cut end of lumber to prevent moisture damage and warping. Some equations and algorithms will calculate the span and spacing for joists and numerous joist span tables for reference too. Tables and span calculators frequently provide joist dimensions, span, and spacing values based on a dead load of 10 pounds per square foot (PSF or psf) and a live-load of 40psf. The height off the ground, wind-load, snow-load, soil-load capacity, and potential seismic forces also factor into the span. I know it's done now but 1200 / 400 = 3... so the joints would sit on a joist just fine.. you could always have doubled up at the joins if you were concerned.. Learn more about the UltraShield® advantage, or find a NewTechWood distributor near youto get started.

Now that all joists are attached to their hangers, they should be self-supporting with the help of your support beams. To close the frame, you will install one final rim joist along the open-ended edge of the joists:are required are given in 4.8m lengths so there is as little joins as possible. All screws are supplies. Some formulas take the bending, compression, and breaking values for wet or dry wood that are based on predetermined values for different species to determine safe loads over specified distances. The formulas have been used to calculate the spans and spacing on different tables in the Building Codes, and are the values used by different calculator algorithms.

Along the foundation wall (by the ledger), this needs to be continuous over 1.8m metres (NZS 7.1.4.2) These are fixed to joists using 100mm landscape screws. If possible, fix the newels so that two faces can be secured through two joists at 90' to each other. 8. Fitting Steps Now, you need to use a pencil or white chalk to mark the face of the ledger board where your joists will be —exactly 16″ from center to center. If using a tape measure, be sure you securely place the tip of it against the outside of the ledger, so you get an accurate measurement. The 2018 IRC is a good place to start as is your local Code which may adjust values or loads for regional conditions. Joist Spans for #2-Grade Dimensional LumberDifferent types of wood, even within species, have different physical characteristics and strengths. Growing conditions also contribute to the variations making timber from one area more desirable for different projects.