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Interior of a Boeing/Stearman PT-17 showing small channel section stringers. In engineering, a longeron or stringer is a load-bearing component of a framework. The term is commonly used in connection with aircraft fuselages and automobile chassis. Longerons are used in conjunction with stringers to form structural frameworks. [1]
Royal Engineers construct a Bailey bridge in Italy, September 1943. Wood planks are being laid over the stringers to construct the roadbed. The success of the Bailey bridge was due to the simplicity of the fabrication and assembly of its modular components, combined with the ability to erect and deploy sections with a minimum of assistance from heavy equipment.
The "former-and-longeron" technique (also called stations and stringers) was adopted from boat construction, [2] and was typical of light aircraft built until the advent of structural skins, such as fiberglass and other composite materials. Many of today's light aircraft, and homebuilt aircraft [3] in particular, are still designed in this way.
Thimble Shoal Light is a sparkplug lighthouse in the Virginia portion of Chesapeake Bay, north of the Hampton Roads channel. [ 3 ] [ 4 ] [ 5 ] The third light at this location, it is listed on the National Register of Historic Places .
Temporary beacon set up after the Civil War. The front light at Fort Sumter completed in 1857. [7] The front light was a white, fifth order Fresnel lens. [2] The station was destroyed during the Civil War. A temporary light with a steamer lens was in place after the war ended and Fort Sumter was reoccupied by federal troops. [8] Later the light ...
Stringer: Steel beam that ties caps together Top cap: Steel Beam Post: steel pipe or 12×12 lumber. Bottom cap: steel beam Wedge pack: 4×4 lumber cut into wedges for falsework adjustment, various lumber sizes include 2×6s and plywood Corbel: distribute load to pads. Typical material is 12×12 lumber and steel beams Pad: distribute load to ground.
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