Is 150 pounds per cubic foot the weight of my slab?
That is a typical normal-weight density for a planning weight. Your mix and reinforcement can differ. It is not a crane chart.
Concrete questions before the truck shows up
Volume, waste, rebar count, and what to tell the plant. Davina will not invent a mix or a bar size.
- Measure length, width, and thickness. Use the calculator for yards and cubic meters.
- Add waste for grade and spillage. Read the bag yield if you are using sacks.
- Order the strength, slump, and air the spec names.
- Brace forms for liquid pressure. Do not add water on site unless the spec allows it.
Common questions
Can I change rebar size if the yard is out?
No. That is an engineer or a revised drawing.