02:08AM | 04/19/06
Member Since: 04/18/06
1 lifetime posts
Help please I am installing a 18x20 carport and need to know how to square the foundation for it.

Thanks to all for your advice


doug seibert

02:46AM | 04/19/06
Member Since: 08/10/02
842 lifetime posts
Generally you SQUARE one corner of the carport foundation.....then determine the length and width of the structure and square a second corner and third corner.........The 6-8-10 rule is a basic math "rule"'s a link (to a 1900's book on the subject).....

The two diagonal measurements should then be equal.......(about 26.9 feet).....if not adjust the stringlines.......

Glenn Good

05:06PM | 05/14/06
Member Since: 09/10/03
314 lifetime posts
The best way to square any foundation is to first lay it out roughly (use a framing square or the 6-8-10 rule). Then pull diagonal measurements between cross corners. When the parallel walls measure the same, and the measurements between both sets of opposing corners match, the foundation is perfectly square.

Moderator: Construction Systems, Foundations, and Masonry & Stone

For more information about me, my qualifications, and/or home inspections please visit my website at:

Glenn Good

05:14PM | 05/14/06
Member Since: 09/10/03
314 lifetime posts
Please note the only thing that I added to Doug’s post above is the parallel walls must also be checked to insure they measure the same when making any corrections to square the building. A trapezoid will also have identical diagonal measurements.

Moderator: Construction Systems, Foundations, and Masonry & Stone

For more information about me, my qualifications, and/or home inspections please visit my website at:
Click to reply button
Inspiration banner


Post a reply as Anonymous

Photo must be in JPG, GIF or PNG format and less than 5MB.

Reply choose button


Post new button or Login button

To test the boundaries of small-footprint living, interior designer Jessica Helgerson moved her family to a 540-square-foo... Filling an underutilized area beneath the stairs is a smart way to save space. Doing so with a stash of wood, however, is ... The Audubon Society inspired wallpaper in this Adirondack-styled mudroom will get you in the outdoor mood. Grab your coat ... Chalkboard paint opens up endless possibilities for customizing your dresser time and time again. Use chalk to label the c... A fireplace in the bathroom creates the ultimate setting for relaxation. Homeowners often choose electric or gas over wood... This roomy boot tray made from punched metal stands up to all the elements. Station it in your mudroom or at your back doo... There’s nothing like a new set of cabinet hardware to refresh a room. The possibilities are endless: Go modern, rustic, or... FLOR tiles are an affordable way to customize a carpeted floor covering for any space. Make anything from runners to wall-... Chalkboard paint features prominently in this elegant yet unpretentious headboard design. Add a new message daily to reflec... Salvaged boards in varying widths and colors make up the dramatic accent wall in this attic space. The high-gloss white of... The indecisive homeowner need not fret over choosing one (or even two) cabinet colors. The kitchen cabinets in this artist... Incorporate nature into your lighting scheme by securing a dead tree in a concrete mold and draping your pendant lamp from... Simple and striking, a couple of pieces of "lovingly used" furniture creates a special kind of charm. A weathered chair fo... First dress up your metal shelves with a coat of paint in an accent color that complements your kitchen decor. Then arrang... Dark wood shelving and a matching upholstered bench keep this closet sleek and refined. The large window brightens the sub...
Follow banner a
Newsletter icon Flipboard glossy Facebook Twitter Pinterest Youtube Rss icon