New Boat Builders Home Page Logo
Disclaimer:   I am not a spokesperson for the US Coast Guard or ABYC. For an official interpretation of regulations or standards you must contact the US Coast Guard or other organization referenced..   More.....

Safe Loading - testing For Capacity

How to test a boat to determine safe load and number of passengers.

The slide show depicts how a boat is tested for maximum weight capacity. These were taken at the US Coast Guard's testing facility in Solomon's Island Maryland during a training session for Coast Guard employees, the contractor that performs the testing, and the contractor that conducts visits to boat manufacturers.

 

Boat Testing Slideshow

Click on the arrows to page forward or back.

1 / 23
The boat is suspended over the test tank
2 / 23
The boat is suspended over the test tank
3 / 23
The boat is suspended over the test tank
4 / 23
The boat is suspended over the test tank
5 / 23
The boat is suspended over the test tank
6 / 23
All openings are sealed. Here a plug is put in the fuel tank fill opening.
7 / 23
The fuel tank vent is sealed to prevent water from entering the tank. Weights are added to simulate the weight of a full tank.
8 / 23
Before the test the amount of weight required is calculated using the capacities on the label.
9 / 23
Straps are attached so that part of the weight is supported by the crane and part by the water and so the boat does not roll over.
10 / 23
Loading of weights into the boat.
11 / 23
Loading of weights into the boat.
12 / 23
Weights are distributed so that the boat does not heel or tilt
13 / 23
Weights are distributed so that the boat does not heel or tilt
14 / 23
Placement of weights is crucial. The load must be balanced so weights must be distributed through out the boat
15 / 23
Placement of weights is crucial. The load must be balanced so weights must be distributed through out the boat.
16 / 23
The boat is slowly lowered until water comes in or the boat floats with no water coming in.
17 / 23
If water enters, weights are re-distributed until it stops. If it cannot be stopped by moving weights, the boat fails.
18 / 23
Again the boat is slowly lowered until water comes in or the boat floats with no water coming in.
19 / 23
The boat is slowly lowered until water comes in or the boat floats with no water coming in.
20 / 23
The boat is slowly lowered until water comes in or the boat floats with no water coming in.
21 / 23
The boat is slowly lowered until water comes in or the boat floats with no water coming in.
22 / 23
The boat is slowly lowered until water comes in or the boat floats with no water coming in.
23 / 23
If no water comes in with all the weights in the boat, it passes. If water comes in, weights are slowly removed until it passes. The remaining weight determines the maximum weight capacity.


American Boat And Yacht Council Westlawn Institute Of Yacht Design Boat Design Net  Woodenboat Forum Wooden Boat Foundation
This Web site may contain copyrighted material the use of which has not always been specifically authorized by the copyright owner. I am making such material available in my efforts to advance understanding of educational, economic, and scientific issues, etc. I believe this constitutes a "fair use" of any such copyrighted material as provided for in section 107 of the US Copyright Law. In accordance with Title 17 U.S.C. Section 107, the material on this Web site is distributed without profit to those who have expressed a prior interest in receiving the included information for nonprofit educational purposes. For more information see: www.law.cornell.edu/uscode/17/107.shtml. If you wish to use copyrighted material from this Web site for purposes of your own that go beyond "fair use", you must obtain permission from the copyright owner.