I have a existing garage with a 16 foot garage door.
Size of beam over 16 garage door.
Now here is a twist.
The procedure for constructing a header for 6 inch exterior wall framing can be modified for any wall thickness.
A balance beam is 16 feet long and 4 5 inches in width and height varies.
Window door garage door headers supporting roof wall floor loads.
The structural ridge span represents the size of a large family room.
I get 18 wide garges submitted often.
The span for the girder is based on the size of an average sized game room.
Width of garage door opening standard widths are 8 9 10 12 14 16 17 and 18 height of the garage door opening standard residential heights are 7 7 6 8 header the header is ideally a minimum 12 wide micro laminated beam that spans the width of the garage door opening.
It also depends on which way your trusses run.
No size 16 is not fat.
The garage was originally post and beam with posts every 10 feet and has a total depth length of 28 feet.
Or less by the doors.
The garage was framed with 2 x 6 joists that span the entire 26 feet from one side of garage to the other with no connection to the garage door header or house structure other than bridging or cross braces.
So for a 16 wide door your beam will have to be 16 6 long.
Building a structural header for a garage door opening can be handled on the jobsite and will offer the same structural support as more expensive solid wood beams.
The door is on the gable end of the garage and the total span is 16 4 with a total garage outside width of 16 11.
Table 1 consolidates loading sizes and cost data for all of the applications.
Needless to say the ceiling has dropped or deflected over 5 5 8 inches in the center.
And the garage door header is based on a 2 car garage door opening.
Window door garage door headers supporting roof loads only.
Header spans are typical for a window and a patio door.
16 garage door headers mt as long as the walls adjacent to the door are 16 or wider i ve used exactly what you cited above however it seems that many want to maximize their openings 16 door with a building that is limited by lot size resulting in 12 in.