# Barge Stability

Discussion in 'Stability' started by Hussein Atwi, Apr 12, 2019.

1. Joined: Apr 2019
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### Hussein AtwiJunior Member

First, Thank you for sharing that self built html, and sorry for the late response. I have received Biran's book and going through it as we speak. I will get back to you with additional information once I improve my general understanding of this topic.

2. Joined: Apr 2019
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### Hussein AtwiJunior Member

It is challenging, specially when I have never even been in contact with any professional work.

3. Joined: Apr 2019
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### Hussein AtwiJunior Member

Even if you were, all comments will be helpful. this is the first time that I'm subjected to any kind of work like that, so positive and negative feedback will only do me good. This was based on my general understanding of what I was able to look/find using our friend google. although, now I am reading the book that I have ordered and slowly attempting to build a broader understanding.

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### Hussein AtwiJunior Member

Well that is exactly what I am working on. Example: I have 18 blocks of Precast Concrete that will be loaded and evenly distributed on a barge which then the Truck and SPMT trailers will just go underneath them lift it up and drive off to delivery. I am required to know how to set the precast how to ensure the deck is capable of handling all the weight when also including the truck and trailer. Then I have to ensure that the barge is stable and stays flat ( This is where the hydrostatics part comes into play). My boss, sent me an email asking me to Learn about hydrostatic stability and build an excel calculator that will tell us where to load the cargo, where all we have to do is change the dimensions of the barge and add the load x-y-z coordinates , we need to know also how will we have to barge it. Excuse my summary but I am trying to make as simple as possible.

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### DejaySenior Newbie

This is somewhat related, as far as I understand it normally you would have a "trim and stability booklet" for your boat:

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### Hussein AtwiJunior Member

oh thank you so much this was an extremely helpful he is lame kind off but very informative lol. as per the table you where talking about I uploaded a pdf example of what i found online. If that is the table you were talking about I'm currently trying to go through it and understand what it means exactly and how I can translate it into my own excel sheet.

#### Attached Files:

• ###### Pacific Trader Displacement Deadweight Tables.pdf
File size:
40.3 KB
Views:
36
7. Joined: Mar 2018
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### DejaySenior Newbie

What? I love his whimsical videos haha.

I don't have any experience with any of this, but that sheet looks like most of what you need? It doesn't make any allowances for the center of gravity not being above the center of buoyancy. But if you make a spreadsheet allowing you to balance the cargo out that might not be an issue. Maybe not being centered needs to be avoided at all costs?
I also don't know what the longitudinal and transverse moment of inertia does to safety / seakeeping (how spread out your weights are and how fast it accelerates based on forces from waves).

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### HeimfriedSenior Member

A stability booklet shows much more than this pdf table. Heel and trim is not considered in the pdf table, but is important.

In reality there is no way to prevent a certain amount of heel and trim at least while you are loading or unloading the barge. Assumed the loads are not containing liquids with free surfaces, there is no hydrostatic point in calculating the position of the center of gravity (CoG[L1]) of a part of the load and the CoG[V] of the loading vehicle. The empty barge will have its CoG[B0] at a known position. The hydrostatic part is to look at the (moving) position of the combined CoG[1] of load, vehicle and barge and calculate what heel and trim it will cause. At the end of loading the first piece after the vehicle leaved the barge there will be a CoG[B1] for the partly loaded barge.

Dejay likes this.
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### DCockeySenior Member

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### Hussein AtwiJunior Member

This was a fun read through all the 3 different articles. Thank you ! I am considering of buying their spreadsheet and go through it and see how it works.

The other thing also Found several youtube videos. Now hopefully over this weekend I'll combine my general understanding and be following up with an update to this post with what I have done/understood so far.

11. Joined: Apr 2019
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### Hussein AtwiJunior Member

This is another used example for a barge drawing that I was able to acquire from a friend of mine.

#### Attached Files:

• ###### Untitled.jpg
File size:
272.5 KB
Views:
37

12. Joined: Apr 2019
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### sonnyofcNew Member

hope my excel program about stability of barge can help solve your problem. You may reach the program on MyStore-OfcSonny https://specialistexcel.ecwid.com

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