Two years ago Chris Gaston, PHD Associated Professor at the Facility of Forestry, University of British Columbia made a
presentation to BAWA on the work of the Forestry Products Innovation Institute in Canada. One of the areas they were looking at were tall buildings.
Brock Commons Tallwood House
At the time the world's tallest timber building was the 53-metre-high, 17 story, Brock Commons Tallwood House in Vancouver, which is a
hybrid with concrete stair towers.
The title of world's tallest timber tower has now been claimed by the Mjøstårnet in Norway which was completed in March 2019. The 85.4-metre-high tower
was built using cross-laminated timber (CLT), a pioneering material that allows architects to build tall buildings from sustainable wood. Timber specialist Moelven Limitre installed the building's timber structure, including elevator shafts made entirely from CLT, and columns made
from glued laminated timber (glulam). Glulam is made from wood that is planed then glued together to form columns or beams, and can be used in the place
of concrete or steel elements.
I keep thinking what I would like to build next; CLT breams are impressive and building with them is practical, but not really an exciting thing
to do. I think it would be more exciting to build a traditional style cathedral with all those massive beams with big joints: now if I can just get a few
hundred volunteers, a big plot of land, an old growth forest and …
The week before the meeting we visited Urban Moose Timber and Design in Newark.
We got to see their uncut logs, cut logs, dried live-edge slabs, the drying kiln,
and the machinery used to cut and surface the slabs. We also got to see the black walnut table top they were working on; it had large cracks and voids filled with black epoxy.
Sections from a Large Monkey tree, Araucaria Araucana or Chilean pine, oozing with sap
John Blackmore checking a stack of slabs
Inside the insulated container that serves as a drying room
The tracks for the sawing machine
The sawing machine stowed in the warehouse when not in use
Harry talked about last year's Toy Workshops where we made Mack trucks. This year we made treasure boxes; Frank Taylor and Harry Filer pre-cut the component parts for 40 boxes
and we have 37 in various stages of completion. During one of the future Toy Workshops we will be finishing them up and staining them. The goal is to have
50 completed by Christmas. We will be donating 25 to each of two different charities.
August 18th: Tom Vogel will talk about Kumiko Zaiku.
September 15th: Dennis Sullivan will talk about how wood is used in architecture, with a focus on how/where wood is being used.
Tom brought in a nice selection of carving tools and examples of pieces he had carved.
One of the pieces was a porpoise that was
placed outdoors above his hot tub so it would move in the wind.
He stressed the importance of having a good method of holding the wood stationary while carving and also
being able to turn the piece around to access all sides of the piece. He told us that there are short tools for one-handed carving and longer tools for two-handed carving.
There are straight-edge tool and curved-edge tools. The curved-edge tools come in different radii, depending on how small or large you want the cut to be.
He talked about
sharpening and how you don't want to put a hollow grind on the carving tools. You cut the primary bevel at about 20 degrees and put a small secondary bevel on the
opposite side of the tool. He often uses 500-600 grit sand paper wrapped around a dowel to cut the secondary bevel on the tool.
Accordng to Tom the best choice for wood that is easy to carve is basswood, also called limewood. Tupelo (cottonwood), and fruit woods like walnut, pecan, almond are also good for
carving. Mahogany and jelutong are good choices, too. He said soft woods like pine tend to bruise and are not a good choice. He said that you can carve wet wood if you
are doing small projects like spoons, but usually, dried wood is best if you want to avoid splits and cracks.
Cutting across the grain is best, but cutting with
the grain down into the grain works, too just avoid cutting up into the grain or you risk chipping the wood.
Tom presented a slide show of the work of Jim Smock, who lives in Santa Barbara. Jim carves full-size figures, including famous people and Design characters. His
work is superb.
Bruce Powell mentioned that the De Young Museum has a carved fireplace on display that has animals carved into it and the work is outstanding.
Burt Rosensweig showed his small models of the Pitts biplane and Cessna 172 and mentioned that they were made the way Tom had discussed in his presentation: roughed out
on the bandsaw and then carved close to the final shape.
Hank brought in a wood puzzle he made. (sorry no picture)
Bruce Powell and Yeung Chan explained exactly what quarter sawn wood is.