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people

are still trying to wrap their heads

around what it cost

to 3d print and so we're just going to

go over a couple things that'll help you

understand that a little bit better

the cost number one factor that drives

the cost

is the mix that you're going to use you

have mixes that are 600 psi you have

mixes that are 50

000 psi obviously when you start

adding synthetic fibers different things

like that you're going to

increase the cost of your mix there's a

motivator to have stronger mixes because

with the right mix and the right formula

you're able to

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get away from rebar which is heavy

costly

and you don't have to peel for the wall

solid with concrete afterwards

so um we've done

tremendous amounts of testing in fact

most of the work that we have done

hasn't been in building a printer it has

been watching walls fall down every day

with different types of mix so that we

can get the math and the algorithm

of how that mix is affected by

wind humidity temperature

and a lot of other factors so

the mixes are all sent down and they're

tested

they give us a 28 day report

of the curing time and then

they'll take these separate the

plastic off it and they will do a break

test

and they will come up with strength

they'll tell you what

psi we're hitting anyway so that's

that's one factor but let's just take a

mix let's say uh

a cinderblock's 1800 psi let's just take

a mix that's uh

about 24 2500 psi let's just pick that

mix

okay bear in mind there's there's tons

of different mixes

and there's a hundred different

additives but we're just going to pick

uh you know 2400 psi

so you're printing you know

much more than what the strength of a

cinder block so there shouldn't be any

uh building department issues

and when we're talking about printing

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oh is it gonna pass code is it gonna

pass code guys you can build

a house at a polystyrene okay plastic

foam uh and

build your walls with that put your

rebar in it pour a solid with concrete

so if you use the printer for nothing

more than just printing your little

polystyrene block wall your your uh

forms let's say uh and then putting

rebar in it and filling the solid with

concrete

there's no code anywhere that we can't

pass

uh cinder block same thing okay we print

uh most of the time uh

50 to 100 stronger than a cinder block

if you're curious about that a little

bit look at the

video where we're shooting guns at uh

cinder block

versus our walls okay on our walls the

bullets bounce off the wall

on cinder block it shatters so

just to just simplify this don't make it

too complex right now

pretend we're just printing polystyrene

uh block okay

no structural strength whatsoever

your structural strength will come in

with the rebar and pouring in solid

okay that's not what we do but let's

just simplify it let's

take it back to just printing a dang

foam wall okay that'll help you a lot

so what you're getting with the concrete

printer is the ability to

print at twice the strength of cinder

block

without any molds forming

set up anything print in place

and give customers designs they have

never ever fathomed

never even could imagine architects like

to do this stuff but every time they do

and the subcontractors come in to start

bidding this stuff

it's too expensive and then they get

back to just fall asleep

square wall straight walls

you know square angles and corners

architects want to do this kind of stuff

now they can't

so okay let's talk uh about wall design

for a little bit

you're an engineer based on your code on

a bearing wall

non-bearing walls he has to decide is he

going to print a wall that's you know 6

inches wide 8 inches wide 12 inches wide

is he going to put internal mortar

support in it and if he is

how tight is that mortar support because

that will drive the cost of this wall up

we know that a wall that's printed like

an inch by an inch

um eight feet tall

the cost for the cost per cubic

inch is point zero zero five

a half a cent a cubic inch at about

2 400 psi okay

then you can go up from there okay

obviously

uh you could pour a hollow wall put

rebar in it

and pour it solid concrete or you can

print a wall with internal mortar

support

put rebar where you want because you're

isolating cells now and just fill these

other areas

um there's i mean there's lots

of different ways and makeups of a wall

so here's a here's a hall

wall okay ideally you want to stay

hollow

because if i can stay hollow i can drop

my

electrical lines in my plumbing lines in

and i'm not

drilling hundreds of two by fours

okay so this is going to make your

electrical and plumbing

a lot less expensive as well okay so

i mean out okay

uh it's strong okay nobody has to worry

about this stuff being strong

it can be as strong as you want it to be

and

without rebar and mortar support but

for your first project you're probably

gonna say you know what let's give the

building

i mean i know a lot of these guys

haven't opened a book in 20 years so

they're probably not up to speed on the

new strengths

and new technology with just concrete

with just

cement based uh mixes

so uh

you can see this ones okay if you look

down on this more

it's wider than this one your structural

engineer is the one that has to decide

that are we to go completely hollow

are we going to go hollow with rebar are

we going to go hollow with mortar

support like i just showed you back

there

okay now when you're trying to figure

out what does that cost a square foot

okay if i have a wall okay like this

that's a hollow wall okay hollow

okay versus this one okay

this one has

more support internal motor support

printed in the middle

and they're like okay well how much how

much is the cost if we have internal

motor support

hell sakes i don't know what is what did

your engineer say you have to have

when you can tell okay because this is

also

a hollow wall okay

you see the difference if you're

printing this

at one inch okay if if this is actually

this wide one inch okay

then which it doesn't have to be it can

be an inch and a half

it can be two inches your mortar support

in the middle

and same thing with your wall here's a

hollow wall

okay uh is it going to be four inches

is it gonna be six inches eight twelve

inches how wide is it going to be

once your engineer has told you okay

we're going to do this wall

because of the calculations and the

strength back from the lab

with those calculations i've determined

we can build a wall and it will surpass

everybody's requirements for a bearing

wall or

interior walls or exterior walls okay

but getting back to cost again you have

to know a couple things

so

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um

okay one side of the wall second side of

the wall

one side of the wall second side of the

wall that's what i'm drawing right here

okay

because now the question is is this

going to be one inch

three quarter inch 1.25

1.5 2 inch

have to know once you have that then we

can figure out what the cost is for the

hollow one

okay when we come back in here

and do this

okay right here okay

what is it same thing is it one inch

quarter

okay when you're done you can figure out

how many cubic inches you have

for linear foot of wall and you'll know

exactly what your cost is going to be

but i can tell you for a wall like this

hollow wall

about inch and a quarter on both sides

your cost

um for this wall is about 11

a running foot no rebar no back filling

just a wall like this hollow

inch and a quarter on both sides you're

going to be at about

11 a running foot okay

so hopefully that clears up and explains

some of the

you know i realize it's a new technology

it's hard for people to get their head

around it

but if you if you think about it it's

kind of not okay

it's a matter of

[Applause]

breaking it down into cubic inch how

many cubic inches of print

of print do we have how tight are we

doing this

okay are we doing it on 12 inch centers

like this

okay are we doing it on

those almost look the same oh we went

from the center okay

or are we doing it on eight inch okay

some people have asked about okay i want

it to look just like a

uh cinder block wall well i i wouldn't

okay it'd be not necessary

so if i have a

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let's say six inch

okay then i've got a

i print the parameters okay

then i got to come back and come across

here

and down there and over here

and over here inside the wall

what is that done well okay i have not

only do i have just

the wall cost to print the perimeters

now i'm duplicating it

right here so that adds

uh plus i have my horizontals i've got

my verticals that are running parallel

with my wall

now i have my horizontals you got to add

those all up

but i mean why would you try and print a

wall that looks like a cinder block

when you can do this i can make these as

tight as i want

okay again

double the the strength of a cinder

block wall in the first place

but if you know what your square hole

square peg

this is just the way i want to do it

knock yourself out

but that costs a lot more

okay then this does and that's why when

you look around the world

this is what people are doing so but

if this is what you're going to do same

thing figure out how many linear

feet you have break it down into cubic

inches once you know how wide you're

printing

and voila you're there so

this is the stuff we talk about every

day actually i mean if you look around

right now we have a university from

arizona here for their

their training and uh this is one of our

classrooms

that uh we work in and

we talk all the time okay

talking about path height because the

next big question is well what's the

labor gonna be

okay well it depends are we are we

printing every single pass

at an eighth inch okay

are we printing our passes at one inch

what mix are we using stronger mixes i

can print faster i use weak mixes and

print too fast what happens

okay the base the thing falls over we

have lots of experience with stuff

falling over

okay two and a half three years of

watching cement fall over fall over fall

over

you want to get some other ideas okay

here's a wall we had one of our classes

print look at this wall it's disgusting

it looks a lot like a lot of the other

walls you're seeing out there right now

okay what happened here

what happened here okay this

what happened so

different mixes different print speeds

uh different pump speeds give you

different effects

we don't want your crap looking like

this you know most everybody out there

they won't show you printing in a wall

from there up to here in one pass

okay they print this high they let it

dry

heaven forbid they try and go this high

it might fall over okay

then they print this high again not

that's super safe it's just super

unnecessary

we print from there we print to there

and

it is all done in one pass and then

while this is

while this is cured down here at the

bottom we actually get on it

and start finishing it so that when

we're up here

okay when we're done it looks like this

smooth wall the opposite side it looks

like stucco

so the type of mix that you use will

determine the speed at which you can

print

how much you print in each pass okay

if i'm going an eighth inch quarter inch

versus an inch

i mean there's four times just to get if

i print an inch

four times faster than if i print a

quarter inch right yep

exactly so anyway

hopefully that answers uh some questions

for you

uh we're just keep trying to put more

videos online that will

address what seems obvious to us we've

been doing this a long time now

but it isn't so obvious and so that's

why this

video is here and while we're making it

right now because sonia says she's

getting tired of answering the same

question

over and over in any case uh try and

watch all of our videos

we know it's easy this isn't maytag okay

this isn't dell computer we don't make

tens of thousands please don't call me

and

well what's the life expectancy of the

printer

hell says call around first of all you

can't get a hold of anybody

second of all do you really think that

there are that many printers that have

been printing for four years that

anybody could really say that

now we can give you our best guess if

your square hole square peg

let me just stop you right there and

tell you hang up the phone

call back in three years we'll give you

everything you want

we've been doing this for three years

but this this isn't a square hole square

peg

thing and so there's certain

personalities that's who they are and

that's the way they are

you know in the nicest way

call somebody else

what you're going to become a part of is

a family

of entrepreneurial like-minded people

that realize they're part of the

solution they're not going to be part of

the problem

they're all working together they're

trying to help each other uh

the excitement level is palpable with

our customers

so anyway we welcome you down here

there is quite a thing list of things

that you have to do to get here

before we can meet with you but we we

welcome you here we do welcome your

calls

the only time we get a little bit

frustrated is if you are calling and

asking about stuff that we have already

answered if you go online you'll see

i've offered more information more

videos

that get into the specifics then all the

rest put together

plus you can actually speak to us so uh

watch our videos please we beg you so

that when we're finally on the phone

with you we're talking about stuff that

matters we're talking about

uh details that we're unwilling to share

until we have non-competes and mdas in

place

so that would just that helps us a

tremendous amount uh

watch our videos please read and pay

attention to the stuff that we send you

once you register

uh and uh outside of that

it's it's just it's fun as heck we love

the people that we are meeting with

the people that understand construction

they understand engineering

or have somebody on their team that does

they understand real estate they

understand

submittals building departments uh

architects engineers

a lot of people oh this is going to be

great i'm going to get a contractor's

license i'm going to start a company i

want to buy one of your printers i'm

like oh brother

okay it's a pipe drink okay i can't

instill into you the

years and years of experience that these

master craftsmen and contractors and

general contractors have

i can't teach that there's universities

i mean

four years for a construction management

degree so i can't teach that in a

three-week training course by the way

our training course is three weeks

you have to send a print crew of three

people and they'll be here

three weeks uh printing and printing and

printing

but uh yeah to those who who

do have that experience or at least have

those that team

uh when they come here they always buy

the other guys

they're afraid of their own shadow what

is the building department says no

and you know a building partners says no

structural engineer is the only one

licensed in the state

to sign off on plans and to say they

make me code once he does his job

okay they can't say no they can say i

don't understand it can you explain the

math

or whatever else but please understand

it is the structural engineer

that went to school for years and years

okay

that is the single authority for

drawing a set of plans take them to the

billing department

depending on what mix you're using and

what method you're trying to do

they're going to have some questions for

you part of the training you get here

but we don't teach structural

engineering we don't do your house plans

for you

we sell the printer and when all that

other stuff is done our printer will

print

what has been designed kind of like

epson okay they sell the

the printer they don't give you the

graphic artist that will create preview

pictures to come out of it so

we are excited to see you hope that

answers some questions i know i'm

talking way too much on this one

i feel sorry for you guys uh get some

adderall and some ambien you'll probably

need both of those in the course of

the next few months as you're trying to

uh uh

just absorb all the exciting

opportunities

and you know that that this is opening

up this is changing

a lot of stuff so that being said thank

you guys we look forward to seeing you

soon