If increasing surface bearing area, what is the effect on floor pressure?

If increasing surface bearing area, what is the effect on floor pressure?

• A. Increases the pressure on the floor
• B. Decreases the pressure on the floor
• C. Has no effect on the pressure
• D. Doubles the bearing area

Answer: (B)

Pressure on the floor depends on how the crane’s weight is distributed over the contact area. If you spread the same weight over a larger area, each square inch (or square foot) carries less load, so the floor pressure drops. This inverse relationship is written as P = W / A: increasing A while keeping W constant lowers P. So, increasing surface bearing area reduces floor pressure, which is why using wider supports or mats helps protect the floor. If the area doubles, the pressure would halve. The ideas that pressure would increase or stay the same don’t hold because the load-per-area must decrease as area grows.

Pressure on the floor depends on how the crane’s weight is distributed over the contact area. If you spread the same weight over a larger area, each square inch (or square foot) carries less load, so the floor pressure drops. This inverse relationship is written as P = W / A: increasing A while keeping W constant lowers P. So, increasing surface bearing area reduces floor pressure, which is why using wider supports or mats helps protect the floor. If the area doubles, the pressure would halve. The ideas that pressure would increase or stay the same don’t hold because the load-per-area must decrease as area grows.