Girder and Panel Building Sets - Development of Girder and Panel Sets

Development of Girder and Panel Sets

The concept for Girder and Panel originated when Kenner president Albert Steiner witnessed the construction of a new office building in Cincinnati in 1956. The steel beam and girder structure of the new building and the steel and glass wall panels later applied to that framework gave Steiner the idea for a new toy. He proposed creating plastic construction toy sets that enabled the child to construct model buildings out of frameworks of red colored girders and beams, with exterior curtain walls, on a foundation board of green Masonite. The specific design of the sets was left to Kenner's James O. Kuhn. His assistant Michael Oppenheim became the product manager for the Girder and Panel product line.

Vertical girders were placed in the holes of the Masonite base board. The top of the square girder had four V-shaped notches. A horizontal beam with a dovetail on each end would then lock into one of the notches on the beam, giving the skeletal structure of the toy building a considerable amount of strength. Tiny pegs protruded from the girders and beams, which then fit into matching holes in the curtain wall pieces, keeping the pieces securely fastened. The girders, beams, and curtain walls from these initial sets were originally molded in polystyrene. But due to negative customer feedback concerning breakage of dovetail ends and the notches in the beams, Kenner quickly switched to using the newly-developed polyethylene plastic for the girders and beams, which provided a small amount of flexibility needed to withstand repeated assembly and disassembly of the pieces.

The curtain walls were produced using a "vacuform" method, and were somewhat brittle as a result. Colors of the curtain wall panels were typically bright yellow and reddish-orange, with a variety of white or translucent "windows." Customers were encouraged to cut the panels with scissors, allowing the panels to fit into corners. Square navy blue roof panels lay on top of the beams, and some roof pieces even had translucent skylight domes molded into them.

Kenner typically created two or three sets of different sizes for each theme of the Girder and Panel toy line, offering the buyer a choice of "basic, better (and best)." Thus, the initial theme of "buildings" was offered as sets #1, #2 and #3, with set #3 having the most parts of the group.

The success of this initial group of three sets inspired Kenner to introduce the Bridge and Turnpike sets, which reflected an "interstate roadway" theme. These sets, #4,#5, and #6, employed frameworks of girders too, but with diagonal truss bracing and other techniques to construct models of various types of bridges, turnpikes, and interchanges. The trusses were very flexible, providing tensile strength, but little compressive strength, requiring trusses and cantilevers to be assembled using engineering principles. Unlike Girder and Panel, the Bridge and Turnpike sets featured roadway sections instead of curtain wall panels.

The next set in the series, #7, was the Combined Girder and Panel, Bridge and Turnpike Set, which provided all the parts from the earlier Girder and Panel sets and Bridge and Turnpike sets. With this combination, one could construct models of structures that combined buildings and roadways, such as a bus terminal or hotel in which ramps lead cars and buses directly into and out of the building.

From there, Kenner introduced their all-time best selling sets: The Motorized Girder and Panel, Bridge and Turnpike Building set. Set #8 added a yellow plastic battery-operated motor unit, and set #9 contained two motor units. With these motors, one could construct buildings with elevators, drawbridges that opened and closed by electric motor, and other motorized structures. These sets included yellow plastic pulleys, spools and wheels to be used in conjunction with the motor unit. Kenner even offered a Motorizing Kit, set #10, to let those who owned the earlier Girder and Panel and Bridge and Turnpike sets motorize them.