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Useful span tables for designing roof rafters

for pitched roofs,  flat roofs  and  ceiling joists

 

 

 Click here for  STRUCTURAL DESIGN CALCULATIONS

 

 

PITCHED ROOF RAFTERS

 

Rafter spans  C24 strength class timber

Table1

 

 

 Click here for  STRUCTURAL DESIGN CALCULATIONS

 


 

Purlins - span tables

 

Table2

 

 

 Click here for  STRUCTURAL DESIGN CALCULATIONS

 


 

Ceiling joists - span tables

 

Table3

 

 


 

Ceiling binders - span tables

 

Table4

 

 Click here for  STRUCTURAL DESIGN CALCULATIONS

 


 

FLAT ROOF JOISTS

 

 

 Click here for  STRUCTURAL DESIGN CALCULATIONS

 


 

Flat roof joists - Strength Grade C24 timber

 

Table5

 

 

Flat roof joists for walking on  - Strength Grade C24 timberTable6

 

 

 

 Professional STRUCTURAL DESIGN CALCULATIONS

 

 

 

 

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