HOJ
Established Member
For my own curiosity I am trying to rationalise these equations for the strength of a bolted timber to timber connection.
![bolt calc design1.png bolt calc design1.png](https://cdn.imagearchive.com/ukworkshop/data/attachments/160/160588-53b50e593bf5656837047a792216b17b.jpg)
My questions are probably simple for some, but would like to seek some clarity as to the actual number values I am dealing with and which should be allocated to the expressions outlined below:
![bolt calc design2.png bolt calc design2.png](https://cdn.imagearchive.com/ukworkshop/data/attachments/160/160589-318cbb4731c074c9cd7190e48848aecd.jpg)
For the value of "ti timber or board thickness or penetration depth, i = (1, 2)." is this just the timber thickness, i.e, 44mm?
What does this ask for:"fh,i,k = characteristic embedment strength in wood member i."
And the therefore the value of "β"
For the "ratio between embedment strengths of members." I am assuming that I need a value for individual timber section thicknesses, more so if they are different, i.e, 44mm and 38mm, but on the basis they are C24, I cant see how the number will be different.
Values for C24:
![c24 tables.png c24 tables.png](https://cdn.imagearchive.com/ukworkshop/data/attachments/160/160591-16689eba84eed9c2012d12753dc68322.jpg)
I was going to use a value for a 4.6, 12mm bolt to apply to the equation, & the basis my 2 timbers are 44 x 195 C24
Hope this makes some sense TIA.
![bolt calc design1.png bolt calc design1.png](https://cdn.imagearchive.com/ukworkshop/data/attachments/160/160588-53b50e593bf5656837047a792216b17b.jpg)
My questions are probably simple for some, but would like to seek some clarity as to the actual number values I am dealing with and which should be allocated to the expressions outlined below:
![bolt calc design2.png bolt calc design2.png](https://cdn.imagearchive.com/ukworkshop/data/attachments/160/160589-318cbb4731c074c9cd7190e48848aecd.jpg)
For the value of "ti timber or board thickness or penetration depth, i = (1, 2)." is this just the timber thickness, i.e, 44mm?
What does this ask for:"fh,i,k = characteristic embedment strength in wood member i."
And the therefore the value of "β"
![fomula for B.png fomula for B.png](https://cdn.imagearchive.com/ukworkshop/data/attachments/160/160590-8f144febbcde07b9f0c7e3b674a73ee4.jpg)
Values for C24:
![c24 tables.png c24 tables.png](https://cdn.imagearchive.com/ukworkshop/data/attachments/160/160591-16689eba84eed9c2012d12753dc68322.jpg)
I was going to use a value for a 4.6, 12mm bolt to apply to the equation, & the basis my 2 timbers are 44 x 195 C24
Hope this makes some sense TIA.