Excavator tree slicing blade - GIF

[Jon]

Excavator tree slicing blade.




Previously:

Excavator stacking concrete blocks - GIF
Excavator saves deer - GIF
Drag harrow attached to excavator for backfilling - photo
Excavator-mounted helical pile drill - GIF
Excavator puts on its own track - GIF
Perfect excavator downhill maneuver - GIF
Excavator delivers justice to car blocking construction site - photo

[hemmjo]

Looks like a chef slicing up vegetables.

[Frank S]

Are palms actually trees or are they some extension of the weed category that is some really soft wood substance

[jdurand]

They're pretty soft with very little root structure besides the ball of fine roots. We have some yucca plants here that are like that too, a tall one got knocked down by a semi (that's not allowed on our street) and so it went on the wood pile. It burns, but not well. So...more like a fat grass (of course redwoods are sort of grass too, but more solid).

[hemmjo]

There are many types of palms. I have no idea how many types or what the names are except for a few. Some I have seen are very tough and have structure much like a "real tree", but the annual rings are not as noticeable. I always told my students to imagine a tree as a bundle of tiny straws standing on end. This helped to explain the reason for the difference between cross cutting and ripping in wood. Also helped them visualize the reason for wood splitting so easily one way but not the other.

The "straws" in a palm are very large in relation to an oak or poplar etc. The "wood" of these can be carved, but the large straws, make the process much different and result is a very different looking finished piece. This wood can also be easily split into slabs that are used for building. Very often siding materials. For example, this home is sided with split palm wood. Coconuts grow some of these type of trees although there are many other palms like this that are not coconut.



Other palms (maybe they are not really palms to a botanist) are more like grass. I have seen one 8" in diameter cut down with a single stroke from a machete. Water droplets dripping freely from the cut. I was sure surprised to see that happen!! The layers that make up the trunk are wrapped together much like a blade of grass. These layers can be easily separated and unrolled when fresh, held flat with rocks and allowed to dry in the sun. These flat sheets are then used like siding to cover homes. Bananas grow on "trees" like this.



The tree being sliced in the photo appears to be different than either of the ones I have seen cut down. The trunk does not seem to be layered like the ones they make sheets from. It also does not appear as tough as the type they split into boards.

Just FYI,

John

[Frank S]

In some cultures around the world certain species of the palm is their primary construction material just as bamboo is in other and even though bamboo is classed as a grass "weed" by some, the wood can be quite soft when green and tough as steel when dried. I've seen some ropes made by the fibers of the fronds that were as strong as any sisal ropes and building structures made of other parts of the local palm that had been standing for 50 years the wood had been sealed with some local concoction or plant oils and mud