Portal Framing Garage Door

Garage door portal framing garage doors are tough.

Portal framing garage door.

Garage doors for example collect a large area of wind pressure and impose large loads on the adjacent wall framing. The apa the engineered wood association has developed a good method to utilize wood structural panels osb or plywood to minimize the framing needed at each side of a garage door without special connectors hold downs to the foundation. Higher capacity with reduced concrete anchorage requirements see alternate garage front options for other options same anchor bolt template. In a portal frame the header extends past the opening and is tied to its wall with overlapping plywood or osb to stiffen the joint.

That s why apa developed a code recognized wall bracing method called the portal frame which is commonly used to frame garage doors but which you can also use as bracing at other door or window openings. This lumber will be used to attach your garage door track and a portion of your assembly. The opening size is also limited to a maximum of 18 feet. Pull a measurement from the floor of your space to the ceiling next to the door opening.

1 inch 25 4 mm 1 foot 304 8 mm. Portal frames are one of the bracing techniques specified utilizing the garage door header as a component. Figure r602 10 6 3 method pfg portal frame at garage door openings in seismic design categories a b and c. The strong wall wood shearwall garage portal system provides higher shear capacity with reduced concrete anchorage requirements.

For the portal frame to resist these loads perpendicular to the wall provisions included in table 1 and figures 1 3 have been developed. Cut two 2 x 6 pieces of lumber and attach to the face of the wall running from the edge of your garage door jambs to the ceiling of your garage. With these limitations a portal frame header should be able to resist gravity loads in addition to the expected lateral loads. The portal frame header should be sized for gravity loads but also must meet the minimum size of 3 x 11 1 4 required per the irc portal frame details.

Portal walls may be used in single or double portal applications and shall be installed with a minimum 3 single or multiple ply header depending upon loading and span requirements. 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.