5 ms·
It's all engineered lumber. "This high-rise is being built using glulam, CLT, and Metsä Wood’s Kerto® LVL (laminated veneer lumber)" glulam = glued laminated t
by buss 8y ago
It's all engineered lumber. "This high-rise is being built using glulam, CLT, and Metsä Wood’s Kerto® LVL (laminated veneer lumber)"
glulam = glued laminated timber AKA pieces of regular timber stacked & glued together
CLT = cross-laminated timber AKA glulam but instead of stacking the lumber, you lay it out in perpendicular layers and glue it together
LVL = laminated veneer lumber is like the above, but made like plywood out of wood bits instead of solid lumber, with a hardwood veneer on the outside
The wood is also treated to be fire, moisture, and insect resistant
- rurounijones 8y agoGiven one of the things that wooden buildings inspire is a "Hey, we CAN build big buildings in a green manner", how do all the things you mention impact that? It sounds like gluing, treating etc. etc. would really impact the "greenness" of this building
- buss 8y agoI think the green-ness relates more to the fact that growing timber captures carbon dioxide, while producing steel and concrete emit carbon dioxide. The production of the glue, and the processes to glue the timber together certainly emit CO2, but nothing near the emissions of a steel foundry.
- atupis 8y agoCement production emits 5% all man made CO2 emissions.
- ggcdn 8y agoThat's true, but here's a thought: Using engineered wood products potentially allows undesirable or unconventional wood sources to become useful building materials, rather than having to source old growth timber for larger beams/columns. There could be some environmental benefits associated with that.
- 6nf 8y agoI agree with your comment but I just need to point out that beam/column timber is not old growth wood, it's usually just from normal commercial plantations.
- ggcdn 8y agoYou're right for typical studs, joints, posts, etc. However, I was thinking that for a highrise timber building, you might need way larger column cross sections than what we're used to seeing (24"x24" - 36"x36" or larger). The typical wood frame construction method of using a ton of load bearing sheathed stud walls scattered throughout doesn't work with these taller types of buildings. You start to see post and beam/panel type framing, which means higher compressive loads, which means larger member sizes.The spruce/pine/fir trees slated for harvesting softwood lumber here in Canada don't seem to reach that size. Hence, you probably need engineered wood products. As a bonus, you also get better and more consistent mechanical properties.
- 6nf 8y agoOld growth wood is not suitable
- vanderZwan 8y agoOn top of the other replies, you should keep in mind that being more green than producing concrete is pretty easy.
- vvillena 8y agoIt does, but the material is still carbon-negative, the article says. In any case, anything is better than concrete.
- ianai 8y agoWhat’s the problem with concrete? Edit-answered above, concrete produces carbon while wood stores it.