Spacing For Interior Flat Roof Joist

Ceilings and roofs excluding trussed rafter roofs for dwellings or ask your lbc surveyor for advice.

Spacing for interior flat roof joist.

Code of practice for permissible stress design materials and workmanship and bs 5268 7 2 1989 structural use of timber section 7 2. Interior spaces that exceed standard sizes such as family rooms and garages require different dimensions in the size of the joist the joist spacing and the joist span. Live load psf dead load psf span calculator for wood joists and rafters available for the iphone. A roof joist is always spaced no more than 16 inches apart from another roof joist.

Spacing in exterior exposure. If the roof is not completely square you can decrease the space between joists but never increase the space. In areas with mild climates patio roofs are generally designed for loads of 30 psf pounds per square foot. Roof rafter span use this table to determine the maximum lengths of roof rafters based on species and grade of lumber spacing dimensions load and slope.

Floor joist span use this table to determine the maximum lengths of floor joists based on species of lumber joist spacing and joist size. The figures are based on quality materials. We offer a complete line of cold formed steel framing products like metal stud framing rc channel metal floor joists metal lath and metal corner bead. The tables below give maximum spans for rafters and beams.

In other words you would space a roof joist 15 inches apart from another roof joist but never 17 inches apart. Joists are the parallel horizontal beams that run across an open space joining opposite walls in a building to support both the ceiling below and the floor above. Maximum clear span of flat roof joists in metres for sc3 timber spacing between joists size of roof joist 400mm 450mm 600mm 47 x 97 1 84 1 81 1 74 47 x 120 2 43 2 39 2 27 47 x 145 3 08 3 02 2 87 47 x 170 3 75 3 67 3 42. Manufacturer of viperstud framerite studrite genieclip and joistrite.

In these cases 2 inch by 10 inch lumber is often used for ceiling joists although trusses may be more practical. Joists are traditionally made from timber. For heavy roofs or in areas with substantial snowfall or winds call your local building department for code requirements. Span calculator for wood joists and rafters also available for the.