Egress windows must use la01 arms only – EFCO WV410 User Manual
Page 6
EFCO CORPORATION 2/2014 PART NO. Y007
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WV410 WINDOW - INSTALLATION INSTRUCTIONS
Section IV- Size Formulas
B. Egress Formulas
Egress openings must be figured based on the clear opening after the vent is opened to the 90
degree position. See the figures and equations below for window sizes at the egress opening.
Use standard window sizing requirements as shown on Page 5 once the egress has been used to
determine the storefront D.L.O. size.
Egress Windows must use LA01 Arms Only!
STOREFRONT D.L.O.
EGRESS OPENING =
STOREFRONT D.L.O. - 3 3/8"
STOREFONT
D.L.O.
EGRESS OPENING =
STOREFRONT D.L.O. - 8 3/8"
Storefront D.L.O. width – 8 3/8” = 90 degree clear opening width
Storefront D.L.O. height – 3 3/8” = Egress clear opening height
* Drawings on this page are not to scale.