don't use screws, use bolts. Nuts inside beam with washer is OK. No need to go to other side of beam with bolt, just drill hole in other side of beam large enough to fit nut driver through (see post below) My old NACRAs all had this, before they went to an integrated traveler track.<br>Jim Casto<br>N5.5 uni #456<br>Austin, TX<br><br>