How to Calculate Rafter Length: Formula, Factors and Examples
Calculate rafter length from rise and run, or from a pitch with a simple factor. Includes a factor table and worked examples.
Home and Energy
Home and Energy
Home and Energy
How Many Bags of Concrete in a Cubic Yard? 40, 60 and 80 lb Bags
A cubic yard of concrete is about 90 bags of 40 lb, 60 bags of 60 lb or 45 bags of 80 lb. See where the numbers come from and how to choose a bag size.
Home and Energy
How Much Concrete Do I Need for a Slab? A 10×10 Example
Work out how much concrete a slab needs, with a full 10 x 10 foot example in cubic feet, cubic yards and bags, plus a waste allowance.
Home and Energy
How to Calculate Roof Pitch: Formula, Chart and Examples
Learn how to calculate roof pitch from rise and run, with the formula, a pitch-to-angle chart and worked examples.