80 years of glued laminated timber 2

[ThePioneer]

The structural glued laminated timber industry in North America is now 80 years old. The very first glued laminated timbers made in North America were in 1934 at Peshtigo, Wisconsin. Those arches are still standing and supporting the roof of the school library in Peshtigo.

 

[ThePioneer]

This post has digressed from the original topic of structural glued laminated timber into glued veneers and plywood.

Structural glued laminated timber is made of dimension lumber with grain orientation parallel. It can be straight or curved. It is utilized for structural arches and beams and trusses and ship ribs and highway noise barriers and utility towers and many other applications.

 

[SAITAETGrad]

Wow...very interesting Tick. Did your grandfather supply the Horten brothers by chance?

I'm not sure why the OP feels the topic is off course...we're all talking about laminated wood assemblies...some are more interesting than others perhaps. I always think these guys got it rolling in a big way:

Link

 

[Sparweb]

Reminds me of the Forest Products Labs. Their research into plywood manufacturing and applications goes back to 1910. You can download the test reports from their library, which is on-line now.

The aero types in the crowd may find it interesting to note that many techniques of structural analysis of "sandwich panels" were studied thoroughly by the Forest Products Labs. These days, the typical aircraft sandwich panel is faced with aluminum or fiberglass, and the core is usually a honeycomb of flame-retardant-soaked nylon (or more aluminum) but the original idea seemed to be plywood facings with corrugated paper core. You can always find the FPL in the references sections of books like Bruhn or ESDU, and in the airframe design manuals used by the OEM's, and, of course, the ANC-18 wood design manual that is still "acceptable data" to the FAA.


STF

 

[KENAT]

Pioneer, I believe some of the Mosquito structure would still fall into your second category since they used a balsa core for some structure but if you don't want to talk about such things fair enough.

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