Four Square

About

"An explanation of the proved mechanical fact that a box of four sides has more strength than a box of two or three sides. The frame in the modern motorcar is a four-sided steel box."

04:01:11:21 VS Boat plane “the Clipper” flying then landing in San Francisco Bay, the Bay Bridge in the background; Philippines written on nose of plane, narrator states plane flew over the Pacific Ocean from Manila to San Francisco; VS the Clipper plane on shore. VS inside hangar where the boat plane was constructed; large beams extend across the hangar; metal sheets are added to form the wing of the plane.

04:04:02:20 VS disembodied arm places lead weights on scale hanging from small one-sided metal beam until beam bends under the pressure; a second three-sided metal beam is used in the experiment, disembodied arm place three times as many lead weights onto the scale hanging from the end of the beam before it bends; box beam is used with four sides supporting 32 lead weights on the scale.

04:05:50:22 Aerial of the Statue of Liberty.

04:06:31:14 Stop-motion animation shows the evolution of car frame designs; the introduction of diagonal cross pieces

04:07:42:25 Four men install box girder-like bridge frame over a stream; VS workers nailing wood planks into bridge frame; VS antique steam roller with black smoke producing smokestack drives over small bridge passing over stream.

04:08:40:01 CU zoom in on spinning Chevrolet hubcap.

Archive

Internet Archive, in Prelinger Archives

Licence or status

The Internet Archive states none for this item.

Credit

Handy (Jam) Organization

Subtitles

Automatic captions

Who can watch

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