Q: How should concrete masonry lintels be detailed over hollow metal door frames? We have 7-foot-high doors that are 7 feet, 2 inches at the top of the frames. The frames wrap around the 6-inch-thick concrete block wall.
A: We know of no way of avoiding a lot of cuts when you install a 7-foot door requiring a 7-foot, 2-inch opening height in a wall with the lintel bearing on the 6-foot, 8-inch block course. Raise the lintel to the 7-foot, 4-inch block course and bolt 2x6-inch boards to the lintel to lower the rough opening back to 7 feet, 2 inches. The width of the metal frame at the head, of course, will be greater than the width of the frame required at the jambs. You can leave the frame at the jambs narrower or you can use a wider frame that overlaps the jamb block more. Always try to use a door size that coordinates with your block coursing.