1. What is Unit Weight of Granite?

Definition: Unit weight (γ) represents the weight per unit volume of granite, typically expressed in kN/m³.

Purpose: This calculation is essential for structural engineering, construction planning, and load-bearing calculations.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( \gamma \) — Unit weight (kN/m³)
• \( \rho \) — Density of granite (kg/m³)
• \( g \) — Gravitational acceleration (9.81 m/s²)

Explanation: The density is multiplied by gravity to convert mass to weight, then divided by 1000 to convert N/m³ to kN/m³.

3. Importance of Unit Weight Calculation

Details: Knowing the unit weight is crucial for structural design, foundation calculations, and determining load capacities in construction projects.

4. Using the Calculator

Tips: Enter the granite density (default 2600 kg/m³) and gravity (default 9.81 m/s²). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What's the typical density range for granite?
A: Granite density typically ranges from 2600 to 2750 kg/m³, resulting in unit weights of ~25.5–26.5 kN/m³.

Q2: Why convert to kN/m³?
A: Structural calculations commonly use kN as the standard force unit in engineering.

Q3: Does moisture affect granite density?
A: Yes, water absorption can slightly increase the unit weight, though granite is relatively impermeable.

Q4: How does this differ from specific gravity?
A: Specific gravity is dimensionless (relative to water), while unit weight includes gravitational acceleration.

Q5: When would I need this calculation?
A: When designing foundations, retaining walls, or any structure bearing granite loads.