Flat Roof Ceiling Joist Span

For example the highlighted cell below shows that a 2 x 6 southern yellow pine joist with a grade of 2 and spaced 24 apart can have a maximum span of 10 feet 0 inches 10 0 if you are designing your structure to support a plaster ceiling.

Flat roof ceiling joist span.

View joist rafter tables. Span tables for flat roof joists to bs 5268 7 2 imposed loads of 0 75 kn m for maintenance and snow load are applicable where there is no permanent access no fixed ladder or staircase and most areas where the altitude does not exceed 100 metres refer to bs 6399 3. Maximum slop3 10 deg. 1 ft 0 3048 m.

Dead load weight of structure and fixed loads 15 lbs ft 2. Span calculator for wood joists and rafters also available for the android os. 1 psf lb f ft 2 47 88 n m 2. Surveyors and structural engineers utilise data from tables below to help calculate the correct size strength and centres of roof timbers for the required spans and loadings.

Supporting imposed load for access and repair only. At least 40mm bearing on supports. Joist breadth 47mm. Ceiling joist span use this table to determine the maximum lengths of ceiling joists based on species of lumber joist spacing and joist size.

Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters. Live load is weight of furniture wind snow and more. This is the distance between joist centres. Surveyors span tables for designing roof rafters.

Simplified maximum span tables for selected visual and mechanical grades of southern pine lumber in sizes 2 4 thru 2 12. Usually 400 450 or 600mm but any value can be used up to 610mm max 1 2 timber strength class and joist size automatically calculate sizes suitable for supporting the loads below. Span is clear span between supports. Also available for the android os.

Sixteen inch oc spacing of ceiling joists made from 2 southern pine allows for a maximum 13 inch span length. 2 are indicated below. Douglas fir maximum horizontal roof rafter span for lumber grade selected structural and no. For pitched roofs flat roofs and ceiling joists.

Large room joist spacing. Floor joist span use this table to determine the maximum lengths of floor joists based on species of lumber joist spacing and joist size.