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Four Sided Umbrellas

Unit of Measurement:	inches	cm

Gores (radiating seams):	4 Gores (?) Four gores -- a seam radiating from each corner only. Close	6 Gores (?) A seam at each corner and two at the center of the "length" edges. Close	8 Gores (?) This Umbrella has 8 gores. Eight seams radiate from the edges to the center. Close

A. Width (shortest side) (?) Measure the distance from one corner to the closest corner. Close	Decimals!	{{data.UofM}}
B. Length (longest side) (?) Measure the distance from one corner to the most distant corner. Close	Numbers!	{{data.UofM}}
C. Hip Measurement ( {{data.txtSugHip}} Suggested) (?) Measure over ribs from corners to center. All four lengths should be equal. The suggested value assumes a tent peak 5% of the unbrella perimeter in height -- measure carefully. Note that the measurement is to the projected (if necessary) point at the center of the umbrella. Close	Numbers!	{{data.UofM}}
Hem (?) The width of a fold of cloth that finishes the umbrella border (usually 3/4 inch -- 1.9 cm”). A similar hem runs all round the umbrella's center opening (covered by the fly). Close		{{data.UofM}}
Fabric Width (?) Actual width of fabric (often 46, 54, or 60 inches -- 1168, 1372, and 1524 mm) Close	Numbers!	{{data.UofM}}

The Umbrella Assembly:

Fabric required = {{data.yards}} yards. Dimensions below include hem and seam allowances.

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Seam allowances = {{data.edgeAllowance}} {{data.UofM}}. When two panels are joined the resulting seam reduces their finished width by {{data.edgeAllowance * 2}}.

List of Materials: Outdoor Umbrella Fabric = {{data.yards}} Yards.
V-69 Polyester Thread = 1 Cone.
YKK® Continuous Zipper Chain #5 White (Coil Chain) = 3 Feet.
YKK® Zipper Slider #5 White Metal Single Lock Pull (Coil Chain) = 1 Each.
Polyester White Hook 1" and Polyester White Loop 1" = 1 Foot.
#0 Spur Grommet 1/4" (Brass) = 1 Grommet Per Rib (if required).
Seamstick 3/8" Basting Tape for Canvas (50 yds.) = 1 Roll.

CLICK HERE FOR CALCULATOR INSTRUCTIONS

NOTE: Our goal is to make the Fabric Calculator as accurate as possible, but please double-check all results thoroughly. Sailrite will not be held responsible for any miscalculations, cut fabric, or purchased fabric as a result of this software.

The Sailrite Fabric Calculator

Four Sided Umbrellas