We have glulam timber which forms a height restriction for a condo parking lot. It is mounted atop 2 verticals out of doors and parallel to the drive way at about 8 feet. The horizontal glulam timber has its 2 ends sawn off at approx. 20 degrees from vertical. The angled ends (or wings) stick out approx 2 feet from the 2 vertical support poles. At the time this glulam was erected it was thought to look cool with the 2 angled ends BUT now we are ready for a change and we would like to cut the 2 ends off square (perpendicular), an easy enough chore.
Is there any chance of "weakening" the glulam by making this cut?
The thought is are we opening up end grain which will be subject to rot or de-lamination or whatever.
Would treating these cuts with polyurethane or some other waterproofing agent be advised.
Since the "wings" stick out beyond the vertical support posts there is nothing STRUCTURAL about them, they are strictly decorative.
I apologize for this long post but I am a novice on glulam and don't want to make a mistake. Thanks in advance. PS location is Colorado mountains and we get much rain snow and sun through out the year.