Portal Framing Garage Door

1 inch 25 4 mm 1 foot 304 8 mm.

Portal framing garage door.

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. This lumber will be used to attach your garage door track and a portion of your assembly. With these limitations a portal frame header should be able to resist gravity loads in addition to the expected lateral loads. Higher capacity with reduced concrete anchorage requirements see alternate garage front options for other options same anchor bolt template.

Garage doors for example collect a large area of wind pressure and impose large loads on the adjacent wall framing. 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. 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.

Pull a measurement from the floor of your space to the ceiling next to the door opening. 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. Where supporting a roof or one story and a roof a method pfg braced wall panel constructed in accordance with figure r602 10 6 3 shall be permitted on either side of garage door openings. 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.

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. The opening size is also limited to a maximum of 18 feet. Portal frames are one of the bracing techniques specified utilizing the garage door header as a component. The irc details related to the header are often misunderstood and misapplied leading to an installation with unintended structural consequences.

Figure r602 10 6 3 method pfg portal frame at garage door openings in seismic design categories a b and c. Simpson strong tie offers a steel strong wall shearwall option for garage portal systems that combines simplified installation with superior performance.