Casement window - Straight or Hinged Arm

weiss528iMarch 28, 2011

We are ordering 3 casement windows. One will be in a bedroom so we are required (for egress) to use the straight arm. The 2 others we can either put in straight or hinged arms. What are the reasons we should consider the hinged arm? What are the reasons we should consider the straight arm?

Thanks in advance.

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The hinged arm will move the sash inward so that you can clean the exterior glass from the interior, but, it decreases the clear opening width approx. 4". The straight arm allows a wider clear opening, but, leaves no room to reach the exterior glass. The egress depends on the total width & height of the window. You must have a clear opening width of at least 20", a clear opening height of at least 24", AND at least 5.7 sq. ft. clear opening. A 3' x 5' casement will pass egress with either arm. However, a 2'6" x 4' casement must have straight arm to pass. What size are you installing in the bed room? Is it upstairs or down? Check with you local code official to be sure.

    Bookmark   March 29, 2011 at 11:23PM
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