A few dummmm questions

Hi all,
My trailer is so wide I am not sure where to put 3/8 bolts to hold it down.
The benroy says 5 on each side but??? I have 6'4" wide and only 1 inch on each side with half inch for walls.
The ends are 1 3/4 inches.
This is a drawing of the metal parts. Hope it helps.
Secondly should I put the bolts on then the top floor (recessed) or put them through all 3 layers and recess them.
If I put them through all layers and some are in the middle how do I cover them for flooring.
Oh yeah. How are you sealing the hole the bolt goes in??
Have fender washers, zink coated hex bolts, nuts
Thank you so much in advance.
Miriam
My trailer is so wide I am not sure where to put 3/8 bolts to hold it down.
The benroy says 5 on each side but??? I have 6'4" wide and only 1 inch on each side with half inch for walls.


This is a drawing of the metal parts. Hope it helps.
Secondly should I put the bolts on then the top floor (recessed) or put them through all 3 layers and recess them.
If I put them through all layers and some are in the middle how do I cover them for flooring.
Oh yeah. How are you sealing the hole the bolt goes in??
Have fender washers, zink coated hex bolts, nuts
Thank you so much in advance.
Miriam