Reinforced sectional door

In an upward acting door characterized by at lease one door section, the improvement comprising:

• spaced apart elongated rail members forming a structural part of said one section, each of said rail members being characterized by opposed spaced apart side walls defining an interior space, said rail members being connected by opposed end stiles, each of said rail members and each of said end stiles being formed of extruded plastic members interconnected to form said one section;
• both of said rail members including an elongated reinforcing member disposed within interior spaces formed in said rail members, respectively, for reinforcing said one section;
• and
• said end stiles each comprise spaced apart side walls interconnected by at least one end wall to define an interior space and said interior space of each of said end stiles includes a reinforcing member insert disposed therein and engageable with said one end wall for reinforcing said one end wall for attachment of faster means to said one end wall.

In an upward acting door comprising at least one door section, the improvement comprising:

• an elongated rail member forming a structural part of said one section and characterized by opposed spaced apart sidewalls and opposed spaced apart endwalls connected to said sidewalls and defining an interior space, said rail member being formed of an extruded polymer;
• a first elongated reinforcing member disposed within said interior space for reinforcing said one section;
• a plurality of openings formed in at least one of said side walls of said rail member and spaced apart from each other;
• and
• a second elongated reinforcing member disposed adjacent an outer surface of said one sidewall and secured to said first reinforcing member by plural spaced apart fasteners projecting through said openings, respectively and without forcibly engaging said one sidewall whereby said rail member and said reinforcing members may move relative to each other as a result of differential thermal expansion.

In an upward acting door characterized by at least one door section, the improvement comprising:

• first and second spaced apart elongated rail members forming a structural part of said one section, at least said first rail member being characterized by opposed spaced apart side walls defining an interior space and a first elongated reinforcing member disposed within said interior space for reinforcing said one section, said first and second rail members each including elongated channel-shaped recesses extending substantially parallel to each other and facing each other, respectively;
• spaced apart transverse stile members interconnecting said first and second rail members, each of said stile members including an elongated channel-shaped recess extending substantially parallel to each other and facing each other, respectively;
• each of said first and second rail members and said stile members being formed of an extruded polymer and said rail members are connected to said stile members by one of thermal and chemical bonding;
• at least one generally rectangular panel insert supported on said one section between said first and second rail members and between said spaced apart stile members;
• and
• removable retainer means releaseably insertable in said channel-shaped recesses in said rail members and said stile members, respectively, for retaining said panel insert in a working position on said one section.