Example structures

Glulam in low-rise houses

Rafter, along length of ridge, two supporting posts. 
Rafters, transverse, two supports.
Floor joists, single span, two supports.
Rafters, two lengthways, two supporting posts. Rafters, transverse, two supports.  Lintel over door or window opening in external wall..
Rafter, along length of ridge, three supporting posts. Rafters, transverse, two supports. Terrace – rafters, floor joists, binders and posts.


Glulam in larger buildings

Straight beam on posts 10–30 m. Curved beam on posts  10 - 20 m.
Pitched beam on posts  10 - 30 m. Boomerang beam on posts 10 - 30 m.
Tied roof truss on posts  15 - 40 m. Three-point portal with finger-jointed haunches  15 - 25 m.
Strutted three-point portal  15 - 30 m. Three-point portal with curved haunches  10 - 50 m.
Three-point tied arch on posts  20 - 60 m. Truss 30–80 m (straight or curved).


Structural design

The best way to achieve a lasting structure is to employ design details that keep the glulam free from moisture. End-grain wood surfaces should be protected against moisture penetration when in contact with damp material such as concrete. Here are a few examples of designs for post supports and protruding beam ends.

Two examples of moisture-resistant post support designs. Cast steel plate (left), post base (right), used to underpin glulam posts for verandas and carports.
Example: Damp-proof design for protruding glulam beam

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