Beam Measurement

[CMARSHALL]

Where is the beam on a boat measured at. Across the top of the boat or across the bottom.

Thanks

[jehardiman]

What are you measuring for? Some calculations require a certian beam measurement. Generally, the beam is stated as the widest part of the hull, no matter where it occurs.

[ABoatGuy]

Except in hard chine planning boat power calculations where your generally thinking about maximum chine beam.