§ 39.577. Goggle lenses and frames.
(a) Lenses for goggles of types 1 and 2 shall be made to conform to the specifications as in § 39.572 (relating to lenses and windows) and every frame tested shall withstand without distortion the drop test.
(b) If the lens frames are rigidly joined by a separate bridge or nosepiece the joints shall be given tests to demonstrate their firmness and durability. Goggles which have already passed the strength test in § 39.576 (relating to goggle frames) and subsection (a) shall be used for this purpose. The lens frames with lenses in place shall be gripped one in each hand, the thumbs bearing on the outer surface and the fingers on the inner surface of the lenses at the point where the bridge is attached to the frame. The frames shall then be bent slowly, the direction of motion being in a plane perpendicular to the surface of the lenses until the outer ends of the frames touch. The frames shall then be bent back to their original shape and a careful inspection made for failure in the joints. All frames shall pass this test wih no visible crack evidenced.
(c) If the bridge is constructed with individual members of the bridge in more than one plane parallel to the surface of the lenses, all of the members except those attached to the rims of the lens frames shall be cut in two and the above test applied to the remaining members.
(d) If goggles are provided with side shields, such shields shall be of metal, pliable leather, or collapsible material of suitable durability. The material shall be sufficiently flexible or malleable to permit adjusting to the contour of the face. The edges coming in contact with the skin shall be finished in a manner to prevent cutting the skin. If metal side shields are used, they shall be perforated, each hole not larger than 0.04 inch. If the side shields are of metal or of noncollapsible material, the construction of the goggles shall be such as to permit the folding of the temples so that they may be stored in a case or container. No part shall be composed of quick-burning material.
Cross References This section cited in 34 Pa. Code § 39.576 (relating to goggle frames).
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