Thanks to all that responded. Tarek noted that the closest spacing for
nailing to the rim joist is 10d @ 4" on center. I belive this is true of most
TJI's as well. I encountered this problem with the TJS series open web joists
used in a commercial project I did. Trus-Joist informed me that the you can't
nail closer than 4" on center on the top chord. Fortunately, this worked out
okay for the capacity I needed but alerted me to some potential problems with
certain members in their line.
Here is how my friend handled the problem:
"Dennis. Actually, [my Rep] called me from the job site to
explain this detail to me, how it was a standard construction detail done all
the time, yada, yada. It still looks mickey mouse to me and 2-10d box nails
aren't going to prevent rollover of the TJI's. Besides, it's end nail
penetration into the top and bottom TJI chords-- the worst connection you
could have for wood construction IMO. I agreed to accept the Timberstrand
rimboard only if they added an upright 2x4 adjacent to the TJI, nail through
the TJI web and nail through the rimboard with 3-10d commons. That ought to
I thought she handled it pretty well.
Thanks again to all who responded.
Dennis S. Wish PE
In a message dated 6/30/99 8:26:12 AM Pacific Daylight Time,
Assuming a 2x6 wall, I prefer the Microlam LVL rim since it makes for
better shear transfer as you dont have to worry about the uplift on the
blocks between the joists, just be carefull with boundary nailing the floor
sheathing into the LVL the max spacing of a 10d nail is 4" o.c
As far as rotation goes, I nail the bottom chord down into the wall top
plates with 2-10d nails ( 1.5" min to joist end ), and use a 2x4 block
between the top chords, the block in turn is nailed to the rim joist and
FYI, end nailing WILL SPLIT the chords of the I joist.
Tarek Mokhtar, SE >>