The thing to remember when discussing doors are that there are two kinds: patio doors, sometimes called Arcadia or sliding doors, and the traditional hinged-to-a-jamb doors, such as the typical front door. With Tech Block , both openings for these doors usually are made using a box form as described in Chapter 5 for windows, but the rough opening dimensions need to take into account the jamb, or lack thereof.
Basically, most patio doors are provided by the window manufacturer, and the rough openings will conform to whatever the windows are doing. We recommend, however, that patio doors are mounted to their openings the same way as are hinged doors, that is, with 'bucks'. A 'buck' is lumber, usually 2x8, that is mounted into the wall opening with its edge flush to the OSB. To the buck, patio doors are mounted using their attachment flanges. Hinged doors are mounted by shimming their jambs to the buck as normally is done in framing.
Here's what we do: We drill and set 3/8" x 12" long galvanized all-thread through the box frame into each grout channel around the inside perimeter of the doorway so that the all-thread is suspended into the channels. When the wall gets grouted, the all-thread becomes imbedded into the grout and will serve as a firm anchor for the pressure treated 2x door buck that the framers will then install into the opening after the box frame is removed. The buck is drilled appropriately to allow for a recessed 3/8" fender washer and nut, and then the buck is tightened down to the blocks that form the opening. The door is then mounted conventionally to the buck with shims.
Door rough openings will need to conform to the dimensions that are needed for the buck plus jamb size, threshold, and trim, so it is best to decide on these items before the wall is to be built.
will then install into the opening after the box frame is removed. The buck is drilled appropriately to allow for a recessed 3/8" fender washer and nut, and then the buck is tightened down to the blocks that form the opening. The door is then mounted conventionally to the buck with shims.