Girder and Panel building sets

The Hydro-Dynamic sets enabled children to be hydraulic engineers, as these sets came with battery-operated pumps, which could pump water through polyvinyl plastic pipes into tanks and back into a plastic tray with a small reservoir. Set #11 had a tray with one pump, and set #12 had a tray with two pumps. Each pump required the use of 2 D-cell batteries that loaded underneath the tray, out of sight. The sets contained many new clear plastic polystyrene parts consisting of spray heads, dippers, turbines, funnels, small and large liquid chambers, and storage tanks.

One could control the flow of the water with valves provided by the sets. Thus, with these sets, one could model structures that employ fluid hydraulics, such as chemical plants, oil refineries, and water treatment plants. Colored dye tablets were included to simulate different types of liquid chemicals. The project booklet included with the set actually suggested a design for a DDT plant, a pesticide that is now banned.

A small amount of classic Girder and Panel and Bridge and Turnpike pieces were included, to allow an office to be built as part of the chemical plant, with roadways leading to it.

As new subdivisions started to spring up around cities beginning in the 1950s and after, Kenner Toys reflected the trend in their Build-A-Home Building sets. The Build-A-Home sets enabled children to construct modern suburban homes, with simulated brickwork or white clapboard siding. New diagonal beams called joists were introduced to permit a low angle pitched roof to be built, and covered with vacuformed plastic roof plates. Styles varied between brick or white vinyl siding. Patios, swimming pools, TV antennas, steeples, chimneys, barbecues, and doghouses were all added as accessories to decorate the home. Molded green polystyrene foam trees along with vacuformed shrubs and vines also provided some crude landscaping.

The basic set was #14, the better set was #15, and the best set of the group was #16. There were no motors or roadway pieces in this group.

The Skyrail sets introduced yellow girders and beams, different colored window and door panels and battery powered red or blue "Sky Cars" that ran on monorail steel rails from building to building. The sets came in two sizes: a single red car set (17), and the bigger two-car set that contained the blue car (18). The sets that came in the upright storage containers were Set #30 (one car) and Set #31 (two cars) There were no track switches, so the layout was either a completed circuit (circle), or a single line, (red end-of-line bumpers were included to prevent the car(s) from flying off the ends). Unique to these sets (besides the 50s futuristic monorail cars, and the metal rails) was the red clip that fit onto the girders to hold up the metal rails, and some green signs that were only for the Monorail that would seem out of place on the conventional Girder/Panel sets. Holes in the non-conductive rubber, between the upper and lower metal rail parts, fit over the clips. This allowed the rails to be tilted into some spectacular angles. The rails fit together with two protruding pins that fit into the next rail, and so on.

Unlike other Monorail toys, the Skyrail sets had no fixed pillars supporting the rails; the buildings that were made by assembling the girder/panel sets would accept the "clips"; the height, width, and complexity of the layout rested solely on the child's imagination. One drawback was the battery box that supplied power to the rails. The configuration of the interior of the box lid resembled a small upturned plastic stool. When one twisted the directional control atop the battery box, the "stool" inside turned and made the contacts touch. After repeated use, the "legs" of the stool broke off, and the box was useless. When designing the Girder and Panel Skyrail sets, the engineer at Kenner carved the rails out of wood. His statement that the curves were nearly impossible to create so the cars wouldn't hang up on them, demonstrates that this was mostly a single man's endeavor.

Later, Kenner upgraded their Girder and Panel, Bridge and Turnpike sets by changing the design to the Modern-As-Tomorrow and Freeway USA sets, which introduced grey colored girders and beams, new panels, newly designed and colored roofs, roadway pieces, realistic road signs and other items such as toll booths, sign and lamp posts.

The last sets Kenner made before they sold to General Mills were the Girdermatic sets, which seemed to be based on mechanical structures, rather than buildings. These sets introduced many new parts that are unique to Girdermatic sets, including a new green colored motor and battery controller, round platforms, cog belts, truss assemblies, giant beams, and Ferris wheel rings, with which one could build moving cranes, observation towers, several different types of bridges, industrial plants and mills with conveyors, and amusement rides such as a Ferris Wheel, Incline ride and Whirling swing.

CAD software tailored to the modeling of Girder and Panel Building Sets allows users to build 3D models of anything one could construct with the physical toy. Also known as a Virtual Girder and Panel Building Set, the only currently known software is RogCAD Virtual Girder and Panel Building Set.[1]

By about 1968, the production of Girder and Panel sets had stopped and did not start up again until about 1974, when Kenner, then owned by General Mills, produced the larger 1,100-piece Sears Tower set #72001 with black girders and panels, which could make a 5-foot-tall (1.5 m) model of the Sears Tower. These sets came with white/grey masonite baseboards. This set had 1,226 pieces, with the Sears Tower requiring 1,197 pieces to build.

Kenner Toys then revived the Girder and Panel line with a series of inexpensive sets. The green Masonite base boards were replaced with interlocking plastic plates. The panels were now flexible printed acetate sheets. The following sets were made when Kenner was owned by General Mills:

Kenner Toys ceased production of the 72000 series of Girder and Panel sets in 1979, ending the long run with their five "KENSTRUCT" sets. The Girder and Panel trademark seems to have been abandoned by the company. In 1992, Irwin Toys of Toronto, Canada applied to the US Trademark Office for the assumption of the abandoned trademark. Irwin then began an entire new line of Girder and Panel sets unlike any that were made before. There were new blue/grey girders, beams, and new diagonal beams for slanted roofs along with new wall panels and some new plastic items were also added. Initially they produced three sets, called "Town Centre," "City Scape" and "Deluxe Skyscraper". All sets now had an internal light run by two AA batteries.

Beginning in 1996, Irwin produced a second line of specialty sets beginning with the Gas Station set listed below. These sets had very little US distribution and were mainly sold in Canada. The following Girder and Panel sets were made by Irwin Toys:

From 2005 until 2016, the Girder and Panel were again marketed by Bridge Street Toys. They created a number of different sets, along with compatible parts for the older Kenner Toys and Irwin Toys sets:

(The last two digits of the set # indicate its year of introduction)

Bridge Street Toys created two prototype sets that were never officially released for sale. www.girderandpanel.net obtained the only 11 copies of each of these sets. 11 of the Toy Store and 10 of the Police Station sets were sold, leaving the one remaining set still available.

In 2005, Bridge Street Toys created a special set for investors and family members as a Christmas gift: