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Bowlegs, zigzags ... there's a reason.

Bowlegs, zigzags . . . there's a reason

A dramatically sculpted wall supports a 15-foot-high roof extension, creating a covered side porch on this house in Petaluma, California. Despite the extra-wide footings and zigzagging base, the construction, by architect Tom Ward, is deceptively simple.

At the top, a triangular truss matches the pitch of the house roof. A post hidden in each angled leg supports the truss. Besides giving visual interest, the angled sections strengthen the wall against side-to-side movement (shearing). Three 4-by-8 beams tie the wall to the house.

For a roof, Ward mounted lightweight translucent fiberglass to a grid of 2-by-4s. The panels provide shelter and let diffused light reach below and indoors.

Photo: Slightly bowlegged open wall supports light-diffusing fiberglass roof. Above woodpile, horizontally hinged triangular wall vents greenhouse

Photo: Built-in light beneath cutouts at peak provides nighttime illumination that washes roof and patio below
COPYRIGHT 1984 Sunset Publishing Corp.
No portion of this article can be reproduced without the express written permission from the copyright holder.
Copyright 1984 Gale, Cengage Learning. All rights reserved.

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Title Annotation:greenhouse design
Publication:Sunset
Date:Oct 1, 1984
Words:145
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