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Find the column for your dead load and spacing, and the row for your timber size to find the permissible clear span in metres. Click on a span to generate a full calculation (you can adjust the exact span). This span table is to the format and methodology given in BS 5268-7.2.
- Free UK Span Table for Flat Roof Joists to BS 5268-7.2 (C16, 1.5 kN/m² ...
Find the column for your dead load and spacing, and the row...
- Free UK Span Table for Flat Roof Joists to BS 5268-7.2 (C16, 1.5 kN/m² ...
Find the column for your dead load and spacing, and the row for your timber size to find the permissible clear span in metres. Click on a span to generate a full calculation (you can adjust the exact span). This span table is to the format and methodology given in BS 5268-7.2.
C24 Span Table - Domestic Flat Roof Joists. Access for maintenance and repair only. Imposed load not exceeding q = 1.02 kN/m2 or Q = 0.9 kN. k k. flat roof joists of solid timber for specified loadings, sizes and spacings.
All members are manufactured from H3 LOSP Radiata to either an F7 or GL8 structural grade and are to be used in accordance with the relevant span table. Product grading of all members is compliant with AS1720 : Timber Structures.
Span tables can be used to determine the size of a timber member of a particular strength class required for a given span. They also tell you what the maximum spacing should be between each section or timber member.
The most common flat roof joist sizes tend to be 150 x 50mm, 175 x 50mm and 200 x 50mm. The spacing will depend on the span and loads, but usually we can see flat roof joist spacing between 400mm and 600mm centres.
13 Σεπ 2019 · #1. From this drawing, what are the correct joist sizes for my flat roof. Some facts; Joist Span 4.8m. Gradient 1 in 80. Joist size 170 x 45 [Regularised Size / Finished Size] Spacing @ 450 c.c. C24 SPAN TABLE. According to this span table. A Dead Load [kN/m2] below 0.25 can allow a span of 3.83m ,
