Okay here go, let go. Oh are you holding it? Yeah, yeah, I'm
generally holding it. Oh that's- (screams) Hey Katelyn.
Hey Evan. Have you ever seen something floating around on the internet and thought this is a neat idea, but what if we made it as big
as a full piece of furniture? What if we over-engineered it to an extreme degree, but also made it prettier? I think that about everything
I see on the internet. (Evan and Katelyn laughing) KATELYN: This video is
brought to you by Squarespace. The all in one platform
for all your website needs. Guys I don't know why we want to take on such a big project, 'cause this is gonna
be complicated. This is gonna be a
big build for us. And I've already done
some 3D modeling here. Let's just show them
the 3D model right here. Look at the underside of that. That's ridiculous.
Okay, can I pause you? Yeah. We haven't said what it is yet.
Oh yeah. We're gonna be making
a tensegrity table. This is a seemingly
impossible floating table that is constructed via tension. Yeah. I'm already feeling tense, just thinking about it. I feel like I'm
hanging by a thread. (laughs) But before
we get into the build and what we're gonna be
doing to improve this. Let's give a quick recap of how tensegrity tables work. ♪ Science Adjacent ♪ ♪ With Evan and Katelyn ♪ ♪ Yeah. ♪ (upbeat music) All right so in this small
scale, 3D printed example, there's four strings, one here, one here, one here and one
at the very center. Well let's say that the one
in the center didn't exist. Gravity would pull the top down and the whole thing
would collapse.
KATELYN: Yes,
because these strings don't have any strength to actually hold up
this whole piece. No, they'll just fold. So let's add a
string in the middle to prevent a gravity from
letting the top fall down. But let's say we take
out the side strings, what will happen if
only this string exists? (funny sound) The top would just tilt off. But if you have all of the
strings working in concert, this string right here
is preventing the top from going down. And these are holding it steady, preventing it from tipping
one way or the other. And this is the basic… MAN: Principle of
tension, integrity i.e tensegrity. Premise behind how this works, opposing strings in tension. The strings on the outside
are pulling in one direction. These are pulling in
another direction. And despite the fact
that this is steady, there's nothing preventing
it from twisting in this structure.
Which is why a lot of these that you see online, there's still a decent
amount of wobble.
Yeah, so if you put a
heavy piece right here, well, one will just bend, but it also twist and that's not the most stable. So that's why in our
full scale model, we're gonna be adding strings
in tension everywhere. We're gonna have 12
strings all the way around. In addition to that
one center string. Yes as opposed to
just these four. Another thing is we're building
this out of solid wood. So all the pieces are
gonna be a lot more heavy.
So should we go into, should I go into all
of the research I did on fishing strings
and clear strings? Or should we just jump into… Oh we went down, we went down, there is a YouTube rabbit hole on like fishing
Oh yeah. And monofilament and fluorofilament.
Fluorofilament. And which is stretchier
verses whatever, whatever. I think before we actually
get into building this, we ordered some string online, but we wanna make sure how much weight it can hold. So let's test that. This fluorocarbon
line that we got is supposed to be
200 pound rated. It should be strong
enough for our wood, but we don't know if
these little crimps will be strong
enough for our wood.
So we need to do a test. EVAN: It's much easier
than tying a knot. KATELYN: And you crunch it. EVAN: Crunch. Is it supposed to make a noise? Nope, just crunches. Oh, well the word
crunch implies a noise. Okay.
Let's put it to the test. And by test I mean… Yeah what do you have
in mind to test it? I'm just gonna stand
on it I think (laughs) 'Cause I weigh at the limit
of what this is (laughs) I don't think we need
to show all of this.
Okay, I didn't know. I still don't know how
you're standing on it. So I just started filming. I don't know how I'm
gonna stand on it either that's why I was like, you don't need to film this 'cause I don't know
what I'm doing (laughs) But you can say about that in all of our projects, at certain moments
in time, you know. I was just thinking on like
clamp something together and then like get
a piece of wood, step on it or something.
Stand on it? This sounds like
recipe for disaster.
No, this…
Could you do this not dangerously. EVAN: It's gonna be great? KATELYN: I feel like
this is how you trip and like break your
head, you know? (Evan laughing) Well, this is gonna
put some weight on it. This is gonna put
some weight on it. Look at that, oh yeah. So that's clamped there. KATELYN: Uh huh. And now I can step
here, oh yeah. Oh, oh, this makes me nervous.
Yeah, it makes me nervous too. I feel like you're
gonna break our table or break that tripod back there or break yourself. Okay. EVAN: But we won't
break our eyes. Okay, ready? KATELYN: Yeah. Ooh! Okay, nothing is broken yet. And this has dug into the 2×4. I mean, let me push
it a little more. Whoa wow! KATELYN: Whoa, whoa! Okay, so this does stretch, but what's crazy to me, is fluorocarbon is the
less stretchy of these… KATELYN: Of the filaments.
Filaments. KATELYN: Yeah.
EVAN: Look at how deep that dug into the wood. So is the amount, so it didn't break. That's good. Is the amount of
stretch too stretchy? I don't know. 'Cause we don't–
I don't know. We don't actually know exactly how much force is gonna
be exerted on this. Well thankfully in my plans, I'm allowing for
at least two inches of tensioning force per line. So we can add a lot of
tension to the system to hold it fairly rigid.
I think… it should be okay, but this whole project
is a compromise because we wanted
really clear lines and all clear lines,
Yeah, because there are… are plastic. There are tensegrity
tables out there that use metal
cords or even chains and things that are a
lot stronger than this. But it feels like
that kind of loses that look of invisibility. This is so you
get a feel for it. Oh yeah. Oh, there's not gonna
be this much tension on our furniture, no.
Yeah, yeah. I think we're good. The crimps hold, they
didn't seem to slip. Hoo!
(water splashing sound) All right, so step one, pass.
Oh god! (laughs) (laughing) you bounced my hand back into my face (laughing) So next up is something that we have done for a while.
We're gonna make some
templates on our CNC to make this whole
thing really precise. 'Cause a big element
of this is balance. Everything needs to be balanced, It's gotta be all, yes…
And precisely positioned. So let's do that. (upbeat rock music) KATELYN: So we're
cutting the templates out of some thin MDF, but the table itself is
gonna be made with this real- (tapping sounds) Ahem. This real chonky butcher block. We didn't have a long enough bit to cut this guy directly, but we can use the templates
and get the same results. First, we'll do a
rough cut of our legs and then clean them up perfectly on the router table. (upbeat music) It looks good! It looks really good! This is very satisfying,
how precise it is. KATELYN: Then we'll cut out
the top and bottom pieces and use the template to get
our pockets perfectly precise. So after hours of work, it's finally time to see if we wasted all of that time.
Oh no! No, it wouldn't be a waste. Like what if it doesn't fit
through the hole? (laughs) Okay, so our leg
pieces are done. Our top and bottom
pieces are done. We're about to plunge into, sounds weird (laughs)
(Evan laughing) We're gonna plunge
into this wood (laughs) We're about to cut the
holes for our pockets. But before we do, we have the perfect
thing to test if the hole is a good fit, 'cause we have this
template here so. Oh, it's a little bit
It's a little loose. Oh nothing a little bit of heavy helping
of glue won't fix.
Normally we have to, it should be tight enough that you have to kind
of like mallet it in. That side's better! Oh, yeah, yeah, and that's
where it's suppose to go. And that's where it's
supposed to be, okay. Okay (laughs) Oh no it's still wobbly. It's strong in this direction, which is the only direction
where like strength is needed. So I think we're good to go. Well moment of truth, do we go for it and to hope that we can just shove
enough glue in there and make it work? Okay. It's been a bit. Has it been over a
year since we did this? Been like two years
since we did this. (reeling sounds) (upbeat techno music) I gotta roll down my pants. 'Cause I'm getting (laughs)
(Evan laughing) I'm getting sawdust in my shoes.
(upbeat techno music) I think I got it. Okay so we did our first pass. It looks pretty good. We have to go even deeper. We're just doing it a
little bit at a time, but the template's working. (upbeat techno music) Okay. Do we feel safe in
removing the template to reveal our final piece? Yes. (Evan groans) Well did you use the real
good double sticky tape? Yep. (Evan groans) I'm hearing noises. Oh god! Oh it pains my fingernails. Where are the tape pieces? (Evan laughing) Are they right in the middle? I have no clue. I can get like some shims. Yeah.
Oh! Oh yeah! Oh it's happening. It's happening. (Evan groans)
Yeah! Oh yeah! Yeah, maybe next time I'll
use a little bit less. (laughs) that was a lot. EVAN: All right. KATELYN: Look at that. EVAN: One half of
it will look like. KATELYN: Yes, I can see it.
EVAN: Just like that. I vote that for the second part, we just like clap and it's done. Right.
Ready? Three, two, one. Ooh!
(enchanting music) Why didn't we do this
for the first one? (laughs) It would've
been a lot easier. Katelyn you know what
we can do right now? What? Oh, we can get a preview. Oh my gosh, that is nice.
Oh! That's gonna be cool. It's also so weird
to look at this and imagine that
it's gonna be held up with fishing line. Yeah, all right, but before we get to assembling, we just need to add a
little bit of hardware. (playful music) All right, so the
easiest way to show you how all of these will work. It's to show you how
one of them will work. We're gonna have
these little loops at the end of our… KATELYN: Of our 12
tensioning assemblies. Loop them into here. And then when we wanna
tension the whole system and get it all rigid, we'll use this
nut to add tension and we should be able to get…
Oh no that's like three
inches of pull on there. Yeah. And I'm sure that that's
gonna be more than I'm… I have a good feeling that this'll be enough to add. Enough tension will be added to the system using these 12
individual clamping systems. And I like that each one can
be controlled individually. That way, if the top is
crooked or unbalanced or pulled in a weird way we can adjust each of the
12 things individually. In a very precise way. So that's it.
(Katelyn laughing) I think it's time for gluing. We need to glue things up. We need to finish our wood and then we can
do the actual test Oh my gosh!
to see if it comes together.
I'm so excited! (playful music) (laughing) No one covers literally the
entire project with clamps.
(playful music) EVAN: I'm just
gonna fill this up? KATELYN: Yeah. (playful music) EVAN: Oh it's leaking out now! KATELYN: Oh yeah. It's recording. I just did a bad thing. I was trying to do
the second glue up by myself and I
used too much force. And I broke it. KATELYN: Oh god, I just
heard what you said. No, you weren't supposed to
hear it like that (laughs) You can't tell me just like hey wait, I need
to say something and I'll tell you
when to come in. (Katelyn gasps) Oh no! EVAN: I know! Oh no! EVAN: I know! No, no, no, no (gasps) Ooh! EVAN: It's bad. That's bad. I know, I know. I think I'm gonna
try to yank this out, but I'm not sure if I can like I was in the middle of doing.
It's on the bottom piece too. Which all the work
has gone into. All the work's gone into. You know, maybe we just like epoxy this back in and
add some stabilizing rods. 'Cause like, this is my problem. Like this was my worry anyways. I mean, I'm not sure how
much force I was adding with these two clamps
squishing this in like crazy anyways. KATELYN: Our worry is that this was where it was
gonna break anyway, when we put the tension on it. Yeah. So maybe… Should we do rods on
both of them like? Maybe rods on both of them. Like this was the danger point that I was worried about
the entire time anyways.
Should I glue this? I'm just gonna glue it. I'm just gonna glue it
back together (laughs) Add rods and hope for the best. I mean, this was something that we're gonna have
to face eventually. I know, I know it's just… I was so pained and
shocked when that happened, I had the same reaction as you. Where I was like. (Katelyn laughing) Well maybe it would have needed to do the strengthening
rod anyways, right there, it's beautiful. It's gonna be powerful. I don't know. Hopefully these will be
enough to reinforce it. (drilling sounds) (drilling making strange noise) (Evan and Katelyn laughing) That one had some whines too. KATELYN: Okay, let's
hope this helps. Hey guys, it's start
for the sponsored spot And I decided that I'd
use this opportunity to prank Katelyn.
Everything is fine. Don't worry. Hey Katelyn, I'm ready. (Evan laughing) I don't know much I can take? EVAN: It's not as bad this time. Okay. Come on over. Katelyn found out that
there's a great place to build websites and
that's with Squarespace there's templates, there's
all in one resources. There's 24/7 support
if anything goes wrong, like, you know, let's say
you break your website. You don't have to worry. Squarespace can help you. (Katelyn laughing) Prank! (Evan laughing) Are there no limits
on how far you will go to prank your dear wife? Similar to how
there are no limits on how many products you
can host on Squarespace? I personally judge
companies by their website. So getting a really good
website is really important. No matter what you do in life. Cause if you guys need a website and you wanna support us and support our sponsors, you can then go to
squarespace.com/EvanandKatelyn for 10% off your
website or domain. Was that good? (laughs)
Yeah. (upbeat music) Okay, after much sanding and some minor panic do a part that's gonna
be a little bit more fun.
Yeah, yeah, chill. We're gonna be adding
color to our creation. Yeah. Katelyn did a really
good job mocking this up via the magic of Photoshop. And this is a technique that we've done once before on our rainbow wood bench. But we basically have these
colored acrylic wood dyes. How intense should we be? It's not supposed to be intense. The fact that you're
using the word intense is making me nervous. It's subtle. Yeah, we need
these two to match. I'm gonna do one,
Katelyn's gonna do one and hopefully they'll
look similar by the end. (Evan and Katelyn laughing) The first little bit
of blue (mumbles) That's not too bad, right? Was this the satisfying shot
that you were hoping for? (Evan laughing) Yeah, the blue isn't
like the super prettiest.
It's not super prettiest, but we're already committed so. Oh my gosh, oh no! Oh like the flinging
of the brush flung blue,
Oh no! everywhere down here. What do I do? It already soaked in? I can wait and sand it off. It's soaked so fast into
this like end grain. KATELYN: Ew! Oh, this is going great, this is going great. KATELYN: Is this pretty? EVAN: I don't know. KATELYN: Don't
add any more blue. Okay. It's kind of ugly. Maybe if I add some pink. I'm not gonna do
anything on mine yet. Just in case we have
to sand everything off. Yeah.
Okay. Don't be too vigorous. Go slow.
Oh yeah. Oh yeah, yeah, slow. No flinging of- oops (laughs) Rubber, right
before we did this. The words that you said. To be nice and subtle
and not overly saturated. No about how fun
this was gonna be and how chill it was gonna be. (Katelyn shouts) What was that?
You sprayed everywhere. I'm sorry.
You sprayed me. Does this match with the vision
that you had in your head. Uh no. (Evan laughing) You know this one is already, we've already started. Oh, this is not bad actually. I think part of it is
that it's just wet also, which makes it darker.
It does dry lighter. That's actually
kinda cool though. It looks kinda cool now. EVAN: This okay? KATELYN: I mean, I don't know. It's still ugly. (Evan laughing) Here's what I
think we should do. We now have all three colors that we are considering. I think we should let it dry and see how it looks.
All right so we've just
been drying our wood. But I think that because this
is looking so cool actually. Yeah it's looking cool. EVAN: Like… KATELYN: Thank goodness. Even over here, like this whole thing
actually looks really pretty. Doesn't it look so pretty? KATELYN: Yeah, it does
look really pretty. I think our instincts with
the blue purple red fade, Yeah.
KATELYN: Were good. Yeah.
We just need to continue and not doubt ourselves. As much.
As much. (Evan laughing) (upbeat music) Are you ready for this moment of complete success
or utter failure? Yes I am. We've finished
painting our pieces.
We've finished applying
finish to our pieces and now we can no longer
put off the inevitable task of finally attempting
to assemble this. Now this is the moment where if like the
materials are too weak or if we add too much tension, this is literally
going to snap again. Again, oh like the wood. Well it might not be
the wood this time, it could be the line. It could be the wood
in a different place. Yeah. There's so many ways
that it could fail, a huge variety.
Isn't that exciting? Yeah, just honestly
just holding this is making me super nervous. Oh no, no, no, no, no, no, no. Look at this. Look at how… MAN: Secure it is. Steady? Okay, here go, let go. Oh! Are you holding it? Yeah, yeah, I'm
generally holding it.
Oh that's (screams)
(Evan laughing) (Evan laughing)
(Katelyn gasps) EVAN: Okay, let go (laughs) C'mon I got it, I
got it, I got it. (shouts) I can't! (Evan laughing) I got so sweaty. Okay, let's add the
secondary reinforcement. It's not flat. It's not straight. If you hold this one. Okay. Clamps are gonna help. I think (laughs) (Katelyn breathes heavily) Okay. (Katelyn screams)
(Evan laughs) So that if we use it so straight there's no tension
on it anymore. It's crooked from my (mumbles) ooh don't bump my hand
with your head oh no! Here don't don't worry about… Can we just like get
this secure (laughs) I went from okay, to so hot and sweaty, like in an instant. Okay. Oh wait. (Katelyn gasps) Okay. So we're clamping
this altogether so that when we add
the fishing line, everything's in
the final position. We want it to be in and we can pull it
to the right tension. Yeah, so now you can let go.
Look at how rigid
and strong this is. Yeah. And the very first
thing that we need to do is add the fishing
line right here, 'cause that's, what's
gonna determine everything. That's where most of
the weight is held. Yeah. We need to install
these little pins so that the wire has
something to hold on to. And didn't we talk about doing a few times back and
forth in the center part. 'Cause this is where most
of the tension is gonna be. I think two should be enough. I mean…
Okay. That's 400 pounds or should we do three? I don't know. Sorry, I'm just gonna
zoom this out (laughs) (Evan laughing)
I mean, worst case scenario. It snaps and we do more.
It snaps and we do more. EVAN: So there's the
crimp right there. And all I need to
do is crimp it.
And then hide this down there. KATELYN: Nice. How should we do this? Cause we have 12… Think we should time lapse this or film each one. Oh no (laughs) let's time
lapse this definitely. (Evan laughing) (upbeat drumbeat music) KATELYN: Okay, so
we're on the final. (thud like sound)
(Evan wincing) KATELYN: Oh no, you okay? Yeah (laughs) Final one. KATELYN: We're on the final one. This last one is like the most
awkward to like reach into. Don't mind me just
reaching under this clamp.
There it is. KATELYN: Look at that
we have our lines being pulled at every corner. We have tension in these
little guys, look at it. EVAN: Just a little bit. KATELYN: A little bit. EVAN: We haven't fully
tensioned it yet. You can kind of see
a preview though. Like behind all of the other
clamps and boards (laughs) The most like nerve
wracking part is next. Removing all the supports. (Evan groans) First off, I'm gonna
remove this one.
(Evan groans) Right here.
Wait, wait. Before you do, should
I kind of like… I'll hold these, you
remove all of the clamps. Okay. These two first. Which two? With the blue ones.
Okay, okay, they're all blue (laughs) (Evan laughing) All right. It is as is just leave it there. We have to move the
other one first. You can't get it out. Oh I can't?
No. 'Cause of the
other one above it. I can't see that. Okay. Okay, so now this guy?
This is the moment of truth. Yeah. All right, it's settling. Should I keep going?
Yeah, keep on going. It's settled. So all of these are loose now. This is tight, but
everything is loose. Okay.
Everything is totally loose and it's gonna be so wobbly.
Okay.
Yeah you just support it. Yeah. If the boards fall,
the boards fall. Yeah. (Evan and Katelyn gasp) Oh good thing I had it all. Oh wow this is… Oh look, it's wobbly, but it's like, it's
doing it's thing. Oh, oh, that's so weird.
It's so weird. Okay.
Okay. Timed tension.
Tension time. EVAN: I'm gonna have
to do like a little bit on this side,
KATELYN: Yeah. EVAN: and then a little
bit on this side. Cause now it's being
pulled to down here. You know what I mean? KATELYN: And then we
should probably like step back and make sure it's not totally
unlevel you know.
Rigid, rigid,
rigid, rigid, rigid. All of these are tensioned. Everything has tension
all at the same time. Yeah. Okay.
You're ready to flip it? Yeah, I think I might be able to get it all by myself. If you get those out of the way. Oh this is actually super rigid. Really?!
Whoa yeah! Oh my gosh! I like tried tilting it and everything grabbed
the two inner posts. Oh it's heavy, dang! I know right! It moves as one unit.
Yeah. Oh my gosh this is crazy. This is it! Like, okay, this
is a heavy camera. No issues. Even look if I put
it on the corner. Yeah. No issues, this does not move. And all other tensegrity
tables we've seen…
If you watch the video, they wobble like crazy. Especially if you put
something off center. Oh my gosh. Now let's put this big, heavy, Router
router on the corner.
Oh my gosh. That is crazy. So to put this to the test, we wanna see if this can
handle some more weight. EVAN: 10 Pounds. Oh yeah! KATELYN: Oh 10 pounds a breeze. EVAN: 15? KATELYN: Easy. 25 okay this is getting a little bit weighty.
So heavy. EVAN: Yap. Oh yeah. Oh, so it's definitely
starting to sag, some right there. You see this?
Yeah, yeah, yeah. Oh don't wiggle it! It's starting to get
to that like (laughs) KATELYN: Can you take it off? Oh I don't like it.
Very good point. No it's good, it's
good, I got it. KATELYN: Ah don't wiggle it.
(Evan laughing) Okay, that was pretty darn good. I think it probably
could do more. I just don't want to put
it under any undue stress. Okay, I'm slightly in shock just because this was
such a nebulous thing in our heads and it works and it has the invisible look. It's like heavy material.
Yeah. It's like, I'm just impressed. Love your designs, the bottom, the tensioning,
the multiple lines. I'm glad I got to flex my brain.
(upbeat funky music) You know what we need to do? We need to get
Supurrvisor's approval. Okay.
She might like this one, 'cause there's like
string on this Katelyn. I know. Joobie what's this? Yeah.
What is this? What do you think? What are you even looking at? Well Joobie look I got tape. SUPURRVISOR: Want tape. Come over here.
(Evan laughing) How come our project is always
the thing on the work bench that you're literally
the least interested in? Oh yes, yes! Wow! Would you want
this in your room? (Evan laughing) Well, I hope you guys
enjoyed this more than our Supurrvisor did. If you wanna hang
out with us more. We stream two to
three days a week at twitch.tv/EvanAndKatelyn. Hope to see some
of you guys there. Bye!
Bye! EVAN: What a beautiful
angle (laughs) KATELYN: Yeah. (Evan laughing) Die!
Coming in, I'm coming in.
Reinforcements.
There's three. Just die!
Oh my gosh! Sir!
(Katelyn gasps) Oh my god, oh my god, oh my god! I hit a cat. (cat meowing) I hit a cat.
It's survived, don't worry. It's right there.
(chiming sound) Oh god!
It's fine. I'm so sorry.
He didn't die. I am SO sorry..