Standard Floor Joist Spacing Nz

But larger is not always better when builders are constructing a home or adding a room addition.

Standard floor joist spacing nz.

The thickness of flooring joists themselves will be determined by what s going on top of them. The components considered include dwangs interior walls and junctions where timber is used for non structural reasons. Joists that sit below end matched joints must be at least 35mm thick. There are also several floor joist sizes and types used.

Lvl nelsonpine co nz www nelsonpine co nz nelsonpine lvl11 floor joists 100x45 floor joists supporting floor loads only 40kg m2 joint spacing 300 450 600 span o h span o h span o h dxb maximum single span 100x45 2300 550 1850 500 1750 400 maximum. At mid span of joists continuous blocking strutting. Instead of having a 2 inch surface area on which to place flooring beams may be 4 inches 6 inches or even wider. Common sense tells you that large floor joists can carry more load and spacing joists closer together also increases the load bearing capacity of a floor.

There are three basic measurements used for floor joist spacing. Properly spacing floor joists when framing an addition or whole structure is largely a factor of building codes. The right spacing depends on the code requirements as well as the type of structure it is and the weight it. They were generally spaced at 450 mm centres across the bearers and supported at their ends on the foundation wall plate or bearer fixed to the top of the concrete wall.

Joists may be spaced as closely as you like but spacing joists 10 to 12 inches apart should handle almost any home use. New zealand po box 3049 richmond nelson 7050 t. The quantity of framing in new zealand housing is often stated to be excessive compared to australian housing. The extra two inches of vertical distance when a floor is framed with 2 x 10 joists rather than 2 x 12s can be quite important for example.

The joists should be spaced at maximum centres according to the table below. The spacing depends on the thickness of decking used. 64 3 543 8800 f. For mid floor joists along the bracing line of all walls in the floor below that contain a wall bracing element.

Where floor joists span more than 2 5 m and the joist depth is 190 mm or greater nzs 3604 2011 clause 7 1 2 3 continuous blocking is required. Joist selection chart joist size maximum joist span between bearers at specified joist spacing 450mm 600mm 90 x 45mm 1 15m 1 00m 140 x 45mm 1 85m 1 60m 190 x 45mm 2 50m 2 15m 240 x 45mm 3 15m 2 70m 290 x 45mm 3 80m. The study examines if and where timber quantities could be reduced and the cost implications of doing so. 64 3 543 8890 e.

Floor joists were typically 150 x 50 mm or 200 x 50 mm but the size could range between 100 x 50 mm and 250 x 50 mm according to span.