Depth of wood floor trusses

[ron9876]

I have a house with 24' spans with wood floor trusses. What is the recommended depth to limit vibrations?

Also at the ledger for the second floor trusses, where the walls are full height masonry, is there a good method to resist lateral load reactions without cross grain bending in the ledger and without casting something into the walls.

 

[ron9876]

Thanks for all the input.