Calculating a single-pitched roof

The program "Calculation of roofs" is a calculator, created to help builders-roofer.
This program has the following functions:
- calculation of a saddle roof

- calculation of the roof area
- calculation of the roof angle
- calculation of the length of the rafters
- calculation of rows of rafters with allowance for the gable and overhangs
- calculation of rafter step
- calculation of the number of rafters taking into account the specified length of the edging board

- Calculation of the battens taking into account all overhangs and rows of rafters
- calculation of the rows of the crate
- Calculation of the number of crates taking into account the set length of the edging board
- calculation of roofing material with graphic information
- installation instructions
- graphic representation of the future roof.

ON THE DESIRE OF USERS, ANY CALCULATION FUNCTIONS AND INFORMATION WILL BE INCLUDED IN THE PROGRAM!