Structural panel useful for skylights

A skylight system, comprising:

• a frame including a plurality of generally right-angularly related frame elements defining a plurality of generally rectangular bays for receiving structural panels;
• a plurality of structural panels received in said bays;
• said structural panels each including a plurality of elongate members defining a panel frame having first and second sides, each of said elongate members having first and second edges each defining an elongate channel;
• elongate infill members movably engaged by said channels, said infill members having first portions received in said channels with clearances provided between said first portions and said channels, said infill members further having second portions exterior of said channels, said second portions providing bonding surfaces on first and second sides of said panel frame;
• translucent or transparent sheet material bonded to said bonding surfaces of said elongate infill members and covering said first and second sides of said panel frame;
• said sheet material and said elongate members having differing coefficients of thermal expansion, wherein differential expansion of said elongate members and sheet material causes said infill members to move within said channels.

A sheet material support system, comprising:

• an elongate beam having a web portion and a first edge connected to said web portion, said first edge having a channel defined therein;
• a first elongate infill member movably engaged by said channel, said first elongate infill member having a first portion received in said channel with clearances provided between said first portions and said channels, said infill member further having, a second portion exterior of said channel and providing a bonding surface generally along the first edge of said beam;
• and
• sheet material bonded to said bonding surface of said first elongate infill member;
• said elongate beam and said sheet material having differing coefficients of thermal expansion, wherein differential expansion of said elongate beam and sheet material causes said infill members to move within said channel.

An I-beam, comprising:

• an elongate beam having a web portion interconnecting first and second edges of the beam;
• first and second channels defined in said first and second edges, respectively;
• each said channel including a wider portion and a narrower portion, said wider portion occurring intermediate said narrower portion and said web portion, whereby each said channel is adapted to engage an infill member having corresponding wider and narrower portions;
• said wider portion further including first and second side walls and an innermost portion, said innermost portion being formed from two converging walls which together form a trench generally centrally located in said innermost portion and aligned with said web portion.

A structural panel, comprising:

• a plurality of metal elongate members defining a panel frame having first and second sides, each of said elongate members including a first and a second edge;
• plastic elongate members movably engaged by the edges of said metal elongate members, said movable engagement being provided by clearances provided between engaged portions of said elongate members and said edges, said elongate members further providing bonding surfaces on first and second sides of said panel frame;
• and
• plastic sheet material bonded to the bonding surfaces of said plastic elongate members and covering the first and second sides of said panel frame;
• said metal elongate members and said plastic sheet material having differing coefficients of thermal expansion, wherein differential expansion of said metal elongate members and plastic sheet material causes said plastic elongate members to move along the edges of said metal elongate members.