is received in the longitudinally extending pocket in the header support member after the roof pitch has been established by rotating the yoke portion of the header arm within the pocket in the header support member the header arm is fastened to the header support member to secure the roof pitch the header support member and the header arm each have a pocket formed therein which is filled with insulating material providing a thermal break within each of these components application_number US 64112391 A description referring now to the drawings where the illustrations are for the purpose of describing the preferred embodiment of the present invention and are not intended to limit the invention described herein fig1 is a cross sectional view of the header system 10 of the present invention the header system 10 includes a longitudinally extending header support member 12 and a longitudinally extending header arm 14 which is pivotally attached thereto referring now to fig2 a cross sectional view of the header support member 12 is illustrated the header support member 12 is typically formed as a longitudinally extending extrusion such as an aluminum extrusion and includes a base portion shown generally by the numeral 16 a first upright portion 18 which is connected to one end of the base portion 16 and a second upright portion 20 which is connected to the other end of the base portion 16 a top portion shown generally by the numeral 22 and a curved portion 24 which interconnects the top portion 22 with the base portion 16 the second upright portion 20 terminates in the base portion 16 and is substantially parallel to the first upright portion 18 the base portion.