Bearer spans

[tcable]

Having completed a few decks in the past one thing seems to be missing from the span tables that i read. Does anybody know of a span table that includes the use of 1 bearer instead of listed to. for example, 2/140 x 45 is what is listed but how do you know if you can get away with 1/ 190 x 45.
If there is such a standards book any help would be greatly appreciated

[echnidna]

if its not in the book it needs to be designed by an engineer

[Loki429]

The span tables seem to give you alternatives when using unseasoned timber but not for seasoned timber.

For example F8 Seasoned 2400 load @ 2400 continuous span shows 2/190x45.
However with F11 Unseasoned you get the option of 2/125X50 or 175x75 or 225x50.
The other Unseasoned timbers have alternatives too but not the Seasoned varieties.

I guess you're stuck in the land of paying for a structural engineer to specify the timber sizes (who is going to over-specify the size to cover their a$$ anyway) or using a different grade timber that does have alternative timber sizes in the table.

[ausdesign]

Some "Builder Designers" who can do the calc's have smaller a$$, 'Loki'