marson wrote:

Here is a link for the engineering of an attic truss. Note the splice
in the bottom chord. Note the bottom chord loading of 40 psf.
http://www.wsitruss.com/Prod_Frame.asp?Truss=A248.

Note that the 40psf is a live load and so is expected to be temporary.
The specified dead load for the bottom chord in the room area is only 5psf.

Chris