13 Mar Writing About Rafter Tables
The following table is called a rafter table in the construction industry. The table is used by carpenters to calculate the length of rafters if you know the slope of a roof.
Roof Slope

Rafter

2 in 12

1.014

3 in 12

1.031

4 in 12

1.054

5 in 12

1.083

6 in 12

1.118

7 in 12

1.158

8 in 12

1.202

9 in 12

1.25

10 in 12

1.302

11 in 12

1.357

12 in 12

1.413

Mathematics:
Show the calculations used to generate the numbers in the second column.
Technical Writing:
Write out the process for using the rafter table.
Illustrate your process with one example.
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