Hahney's formulas from the "Log Span Tables" 2

[Lutfi]

Hello to all. I hope everyone one is doing well. I am searching for Hahney's formulas for Log Span Tables. I searched on line and came back empty handed. Does anyone know where I can get a copy for this nice book?

Regards,
Lutfi

Regards,
Lutfi

 

[dik]

Lutfi... not able to find a copy, but found this site. It has numerous grades of uncommon lumber. Do you have a listing of the formulae involved... I may be able to do up an SMath program:

http://www.timbertoolbox.com/Calcs/logbeamcalc.htm

Output

So strange to see the singularity approaching while the entire planet is rapidly turning into a hellscape. -John Coates

-Dik

 

[dik]

Does anyone know what Hahney's formulae are? I assume the values are working stress design.

So strange to see the singularity approaching while the entire planet is rapidly turning into a hellscape. -John Coates

-Dik

 

[BAretired]

Why not use the calculator and check stresses by hand?

BA

 

[Lutfi]

@DIK, thanks. I found this web site a while back. It is not what I am looking for though. I want to add the book to my library.

Regards,
Lutfi

 

[Lutfi]

@BAretired, thanks. That is a helpful application that I have known about for a while. However, it is not what I am looking for. I need the book for my library.
For design of round logs, using Florida Cypress, I check stresses by hand and I also use EnerCalc which allows me to add Cypress mechanical properties into its data base. I then run the design, using Cypress entered properties, as sawn lumber sections that are less than or equivalent to the log sectional properties.

Thanks, again.

Regards,
Lutfi

 

[dik]

thanks BART... but I don't know what formulae they are using... else I would have written up an SMath program to do the trick. That's why I asked if someone knew what Hahney's formulae are. I don't know if he uses the full section modulus and moment of inertia based on the 'full' cross section or how he calculates horizontal shear stresses.

So strange to see the singularity approaching while the entire planet is rapidly turning into a hellscape. -John Coates

-Dik

 

[dik]

Sorry... Lutfi... didn't know that. It doesn't seem to be available, out of print, or whatever.

So strange to see the singularity approaching while the entire planet is rapidly turning into a hellscape. -John Coates

-Dik

 

[BAretired]

There may be something useful here:

https://www.tfguild.org/downloads/Log-Engineering-Handout.pdf

BA

 

[dik]

Thanks, BART. It calculates the section properties based on the round, or slightly flattened section.

So strange to see the singularity approaching while the entire planet is rapidly turning into a hellscape. -John Coates

-Dik

 

[robyengIT]

looks like available

https://www.amazon.ca/Tables-Floor-Joists-Support-Systems/dp/0963690205

 

[Lutfi]

@robyengIT, you get a star! It never showed upon my search at amazon or eBay. It is available form the the Canadian Amazon. It is already ordered.

Thanks to all for your help.

Regards,
Lutfi