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Default how much weight will two layers of 3/4" plywood hold?

I have two groups of 3, 2x8's and one group of 5, 2x8's. I am running the groups of 3 for the sides and the group of 5 down the middle. Each group is 7' long and am planning on 4' wide. Do I need two layers or will one layer work? The ramp/table will need to hold 1300lbs. when I ride upon it. After I get off bike it will have approx. 1000lbs on it.

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On 4/1/2021 11:45 AM, Murel wrote:
I have two groups of 3, 2x8's and one group of 5, 2x8's. I am running
the groups of 3 for the sides and the group of 5 down the middle. Each
group is 7' long and am planning on 4' wide. Do I need two layers or
will one layer work? The ramp/table will need to hold 1300lbs. when I
ride upon it. After I get off bike it will have approx. 1000lbs on it.


That's overkill . 4 2x6's , spaced on 1 foot centers , run the ply
wood crosswise , that is the surface grain should be crosswise to the
length of your ramp . One layer will hold that load , use 2 if it makes
you feel better . My last ramp was 3 2x8's tied together with 2x4 cleats
on the underside . Worked swell to load the bagger on my trailer .
--
Snag
In 1775, the British demanded we give them our guns.
We shot them.
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Default how much weight will two layers of 3/4" plywood hold?

On Thursday, April 1, 2021 at 5:01:14 PM UTC-5, Snag wrote:
On 4/1/2021 11:45 AM, Murel wrote:
I have two groups of 3, 2x8's and one group of 5, 2x8's. I am running
the groups of 3 for the sides and the group of 5 down the middle. Each
group is 7' long and am planning on 4' wide. Do I need two layers or
will one layer work? The ramp/table will need to hold 1300lbs. when I
ride upon it. After I get off bike it will have approx. 1000lbs on it.

That's overkill . 4 2x6's , spaced on 1 foot centers , run the ply
wood crosswise , that is the surface grain should be crosswise to the
length of your ramp . One layer will hold that load , use 2 if it makes
you feel better . My last ramp was 3 2x8's tied together with 2x4 cleats
on the underside . Worked swell to load the bagger on my trailer .
--
Snag


Just curious. Did you have any issues with the ramp being slick when
things were wet? I was thinking some sort of expanded metal or wire
mesh would be good.
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Default how much weight will two layers of 3/4" plywood hold?

On 4/1/2021 5:33 PM, Dean Hoffman wrote:
On Thursday, April 1, 2021 at 5:01:14 PM UTC-5, Snag wrote:
On 4/1/2021 11:45 AM, Murel wrote:
I have two groups of 3, 2x8's and one group of 5, 2x8's. I am running
the groups of 3 for the sides and the group of 5 down the middle. Each
group is 7' long and am planning on 4' wide. Do I need two layers or
will one layer work? The ramp/table will need to hold 1300lbs. when I
ride upon it. After I get off bike it will have approx. 1000lbs on it.

That's overkill . 4 2x6's , spaced on 1 foot centers , run the ply
wood crosswise , that is the surface grain should be crosswise to the
length of your ramp . One layer will hold that load , use 2 if it makes
you feel better . My last ramp was 3 2x8's tied together with 2x4 cleats
on the underside . Worked swell to load the bagger on my trailer .
--
Snag


Just curious. Did you have any issues with the ramp being slick when
things were wet? I was thinking some sort of expanded metal or wire
mesh would be good.


Expanded mesh would work , I don't think I ever loaded mine while it was
wet . Check a ceramic tile outlet , they use a mesh sometimes as a
backing for a mortar wall tile install .
--
Snag
In 1775, the British demanded we give them our guns.
We shot them.
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Default how much weight will two layers of 3/4" plywood hold?

On Thursday, April 1, 2021 at 7:24:26 PM UTC-5, Snag wrote:
On 4/1/2021 5:33 PM, Dean Hoffman wrote:
On Thursday, April 1, 2021 at 5:01:14 PM UTC-5, Snag wrote:
On 4/1/2021 11:45 AM, Murel wrote:
I have two groups of 3, 2x8's and one group of 5, 2x8's. I am running
the groups of 3 for the sides and the group of 5 down the middle. Each
group is 7' long and am planning on 4' wide. Do I need two layers or
will one layer work? The ramp/table will need to hold 1300lbs. when I
ride upon it. After I get off bike it will have approx. 1000lbs on it.

That's overkill . 4 2x6's , spaced on 1 foot centers , run the ply
wood crosswise , that is the surface grain should be crosswise to the
length of your ramp . One layer will hold that load , use 2 if it makes
you feel better . My last ramp was 3 2x8's tied together with 2x4 cleats
on the underside . Worked swell to load the bagger on my trailer .
--
Snag


Just curious. Did you have any issues with the ramp being slick when
things were wet? I was thinking some sort of expanded metal or wire
mesh would be good.

Expanded mesh would work , I don't think I ever loaded mine while it was
wet . Check a ceramic tile outlet , they use a mesh sometimes as a
backing for a mortar wall tile install .
--
Snag
In 1775, the British demanded we give them our guns.
We shot them.


A lot of the utility trailers we have here in Nebraska have floors and ramps made of expanded
metal. The frame is angle iron. One advantage is the mud and water disappears all by itself. I don't
know if that makes us lazy or efficient.
There aren't many who haul bikes or 4 wheelers in their pickups.


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Default how much weight will two layers of 3/4" plywood hold?

On 04/01/2021 04:33 PM, Dean Hoffman wrote:
On Thursday, April 1, 2021 at 5:01:14 PM UTC-5, Snag wrote:
On 4/1/2021 11:45 AM, Murel wrote:
I have two groups of 3, 2x8's and one group of 5, 2x8's. I am running
the groups of 3 for the sides and the group of 5 down the middle. Each
group is 7' long and am planning on 4' wide. Do I need two layers or
will one layer work? The ramp/table will need to hold 1300lbs. when I
ride upon it. After I get off bike it will have approx. 1000lbs on it.

That's overkill . 4 2x6's , spaced on 1 foot centers , run the ply
wood crosswise , that is the surface grain should be crosswise to the
length of your ramp . One layer will hold that load , use 2 if it makes
you feel better . My last ramp was 3 2x8's tied together with 2x4 cleats
on the underside . Worked swell to load the bagger on my trailer .
--
Snag


Just curious. Did you have any issues with the ramp being slick when
things were wet? I was thinking some sort of expanded metal or wire
mesh would be good.


Anti-slip deck paint might work.

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Thanks for the reply, I was worried about a fall. It really hurts when you get older. Thanks again M.

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At 70 years, I know when not to ride. But your are right it can get slick, I had to repair my roof in the rain and slipped several times before finishing up. I am a very fair weather rider now days, so the yamahammer stays under the car port. Thanks again.M.

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Default how much weight will two layers of 3/4" plywood hold?

In alt.home.repair, on Thu, 1 Apr 2021 16:45:03 +0000, Murel
wrote:

I have two groups of 3, 2x8's and one group of 5, 2x8's. I am running the groups of 3 for the sides and the group of 5 down the middle. Each group is 7' long and am planning on 4' wide. Do I need two layers or will one layer work? The ramp/table will need to hold 1300lbs. when I ride upon it. After I get off bike it will have approx. 1000lbs on it.


What are you talking about? What are these groups, how do they relate
to each other, and how to the 2x8's within a group relate to each other,
are they at an angle, a ramp, what do the 2x8's do, what does the first
group do that the second group doesn't and vice versa, and most
important, what is the point of all this? In other words, ask a
question everyone can follow.
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On 4/1/2021 9:45 PM, merle wrote:
Thanks for the reply, I was worried about a fall. It really hurts when
you get older. Thanks again M.


I'm no spring chicken myself . Got a trike in reserve for when I can't
hold the bagger up any more .
--
Snag
In 1775, the British demanded we give them our guns.
We shot them.


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On Thursday, April 1, 2021 at 10:51:16 PM UTC-5, Snag wrote:
On 4/1/2021 9:45 PM, merle wrote:
Thanks for the reply, I was worried about a fall. It really hurts when
you get older. Thanks again M.

I'm no spring chicken myself . Got a trike in reserve for when I can't
hold the bagger up any more .
--
Snag
In 1775, the British demanded we give them our guns.
We shot them.


I traded my last bike for a trike. It is nice to have more storage space when traveling. I hope to do more of
that now that I'm retired. One could buy a really nice car or pickup for the price of some of the
Goldwing and H.D. trikes.
There sure seem to be a lot of the "new" Can Am Spyders for sale. I think I saw one that was a 2016 for sale
with 0 miles advertised. I don't remember seeing one on the road.
Mine's a 900 Kawasaki Vulcan with a Lehman Storm conversion.
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On 04/02/2021 07:14 AM, Dean Hoffman wrote:
There sure seem to be a lot of the "new" Can Am Spyders for sale. I think I saw one that was a 2016 for sale
with 0 miles advertised. I don't remember seeing one on the road.


I've seen a few. The Ryker is also interesting. When I went to the CanAm
site to see if the Ryker is still in production I noticed they're all
sorts of woke.

There isn't a dealer in town Or I might take a look. There is a Polaris
dealer but the Slingshot looks like a Lotus Super 7 that lost a wheel.
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On Fri, 2 Apr 2021 07:51:03 -0600, lowbrowwoman, the endlessly driveling,
troll-feeding, senile idiot, blabbered again:


I've seen a few. The Ryker is also interesting. When I went to the CanAm
site to see if the Ryker is still in production I noticed they're all
sorts of woke.

There isn't a dealer in town Or I might take a look. There is a Polaris
dealer but the Slingshot looks like a Lotus Super 7 that lost a wheel.


Yep, more off topic blather again, senile gossip.
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On Fri, 2 Apr 2021 06:14:07 -0700 (PDT), Dean Hoffman
wrote:

On Thursday, April 1, 2021 at 10:51:16 PM UTC-5, Snag wrote:
On 4/1/2021 9:45 PM, merle wrote:
Thanks for the reply, I was worried about a fall. It really hurts when
you get older. Thanks again M.

I'm no spring chicken myself . Got a trike in reserve for when I can't
hold the bagger up any more .
--
Snag
In 1775, the British demanded we give them our guns.
We shot them.


I traded my last bike for a trike. It is nice to have more storage space when traveling. I hope to do more of
that now that I'm retired. One could buy a really nice car or pickup for the price of some of the
Goldwing and H.D. trikes.
There sure seem to be a lot of the "new" Can Am Spyders for sale. I think I saw one that was a 2016 for sale
with 0 miles advertised. I don't remember seeing one on the road.
Mine's a 900 Kawasaki Vulcan with a Lehman Storm conversion.


There are 3 CanAm Spyders here within a 2-block radius of my house, all
owned and ridden by women. Two of the women are older and retired. I see
them head out on most weekends if the weather is nice, following their
husbands who are riding 2-wheeled motorcycles. The third is a younger
single lady who rides her CanAm to work most days, rain or shine, year
round, and likes to ride at night and on weekends. If you get her started
on why she rides and what she likes, you can plan on being there a while.

I haven't seen an HD trike around here, except passing through on the
Interstate. Those things tend to have two wheels in the rear, which is way
too dangerous for me. You couldn't pay me to ride one of those on the
highway since they're only stable when going in reverse. Two wheels in the
front is the way to go, when it comes to trikes.

As for me, I'm still riding my old 2007 FJR1300. It works for what I do.

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On Fri, 02 Apr 2021 13:36:22 -0500, Jim Joyce posted for all of us to digest...


I haven't seen an HD trike around here, except passing through on the
Interstate. Those things tend to have two wheels in the rear, which is way
too dangerous for me. You couldn't pay me to ride one of those on the
highway since they're only stable when going in reverse. Two wheels in the
front is the way to go, when it comes to trikes.


I am not knowledgeable about trikes but it seems to me that the reverse would
be true regarding the stability. All the children's tricycles I have seen have
been single front wheel. Wouldn't that translate to full size??

--
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On Fri, 2 Apr 2021 15:17:28 -0400, Tekkie© wrote:


On Fri, 02 Apr 2021 13:36:22 -0500, Jim Joyce posted for all of us to digest...


I haven't seen an HD trike around here, except passing through on the
Interstate. Those things tend to have two wheels in the rear, which is way
too dangerous for me. You couldn't pay me to ride one of those on the
highway since they're only stable when going in reverse. Two wheels in the
front is the way to go, when it comes to trikes.


I am not knowledgeable about trikes but it seems to me that the reverse would
be true regarding the stability. All the children's tricycles I have seen have
been single front wheel. Wouldn't that translate to full size??


Try pitting a Reliiant Robin against a Morgan or an Isetta. The
Robin will loose every time when it comes to stability - and kids
fal;l off of tricycles quite often - I know I dumped mine often enough
as a kid and had it up on 2 wheels too often to count. Braking into a
turn is almost guaranteed to dump or at least destabilize a single
front wheel trike particularly if a short wheelbase with a moderately
high center of gravity.
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On Fri, 02 Apr 2021 17:03:45 -0400, Clare Snyder posted for all of us to
digest...


On Fri, 2 Apr 2021 15:17:28 -0400, Tekkie© wrote:


On Fri, 02 Apr 2021 13:36:22 -0500, Jim Joyce posted for all of us to digest...


I haven't seen an HD trike around here, except passing through on the
Interstate. Those things tend to have two wheels in the rear, which is way
too dangerous for me. You couldn't pay me to ride one of those on the
highway since they're only stable when going in reverse. Two wheels in the
front is the way to go, when it comes to trikes.


I am not knowledgeable about trikes but it seems to me that the reverse would
be true regarding the stability. All the children's tricycles I have seen have
been single front wheel. Wouldn't that translate to full size??


Try pitting a Reliiant Robin against a Morgan or an Isetta. The
Robin will loose every time when it comes to stability - and kids
fal;l off of tricycles quite often - I know I dumped mine often enough
as a kid and had it up on 2 wheels too often to count. Braking into a
turn is almost guaranteed to dump or at least destabilize a single
front wheel trike particularly if a short wheelbase with a moderately
high center of gravity.


Ok, gotcha.

--
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On 04/02/2021 01:17 PM, Tekkie� wrote:

On Fri, 02 Apr 2021 13:36:22 -0500, Jim Joyce posted for all of us to digest...


I haven't seen an HD trike around here, except passing through on the
Interstate. Those things tend to have two wheels in the rear, which is way
too dangerous for me. You couldn't pay me to ride one of those on the
highway since they're only stable when going in reverse. Two wheels in the
front is the way to go, when it comes to trikes.


I am not knowledgeable about trikes but it seems to me that the reverse would
be true regarding the stability. All the children's tricycles I have seen have
been single front wheel. Wouldn't that translate to full size??


https://www.carscoops.com/2021/01/th...s-were-banned/

Remember those gems? I went to an ATV race where some guy showed up with
an old three wheeler. It wasn't high speed since it was held in a rodeo
arena but the guy spent a lot of time putting the thing back on three
wheels after he dumped it.

Then there is this thing:

https://en.wikipedia.org/wiki/Piaggio_MP3

At the height of the scooter craze there was a dealer downtown. I was
walking around one night and stopped to look at the models. I always
wanted a Vespa -- when I was 16. My father put his foot down; motor
cycles were fine something with 10" wheels was not fine.

Anyway the guy tried talking me into a test ride but I declined. Like a
sidehack, it looks like a motorcycle but it definitely is NOT a
motorcycle. If any emergency situation came up I would do absolutely the
wrong thing.

I looked at trike recumbent bikes a few years back and they come in both
configurations with the two in front being called tadpoles. They made
more sense to me than a two wheel recumbent. I'd rather not fall over
trying to get moving on a hill.
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On 4/2/2021 8:14 AM, Dean Hoffman wrote:
On Thursday, April 1, 2021 at 10:51:16 PM UTC-5, Snag wrote:
On 4/1/2021 9:45 PM, merle wrote:
Thanks for the reply, I was worried about a fall. It really hurts when
you get older. Thanks again M.

I'm no spring chicken myself . Got a trike in reserve for when I can't
hold the bagger up any more .
--
Snag
In 1775, the British demanded we give them our guns.
We shot them.


I traded my last bike for a trike. It is nice to have more storage space when traveling. I hope to do more of
that now that I'm retired. One could buy a really nice car or pickup for the price of some of the
Goldwing and H.D. trikes.
There sure seem to be a lot of the "new" Can Am Spyders for sale. I think I saw one that was a 2016 for sale
with 0 miles advertised. I don't remember seeing one on the road.
Mine's a 900 Kawasaki Vulcan with a Lehman Storm conversion.


This trike is a 2009 XL1200L converted with an aftermarket
axle/swingarm . It has saddlebags ,but my 1990 Ultra has much more
storage .
--
Snag on the
travelin' laptop

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On Fri, 2 Apr 2021 20:39:09 -0600, lowbrowwoman, the endlessly driveling,
troll-feeding, senile idiot, blabbered again:


Remember those gems? I went to an ATV race where some guy showed up with...


Oh, ****!


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On Fri, 02 Apr 2021 17:16:24 -0400, Tekkie© wrote:

Ok, gotcha.


The first generation ATVs were 3 wheeled. They are better in the bush
because it's impossible to end up with a tree between the front wheels.

Then the safety Nazis took over.
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On Thursday, April 1, 2021 at 12:45:08 PM UTC-4, Murel wrote:
I have two groups of 3, 2x8's and one group of 5, 2x8's. I am running the groups of 3 for the sides and the group of 5 down the middle. Each group is 7' long and am planning on 4' wide. Do I need two layers or will one layer work? The ramp/table will need to hold 1300lbs. when I ride upon it. After I get off bike it will have approx. 1000lbs on it.

--
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So one area has 3.5 ft between joists, the other 1.7 ft. I'm sure you can look up
some tables that show deflection versus spacing. My guesstimate is that one
layer is plenty for the shorter span and that you need more joists on the other span.



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On 4/3/2021 6:50 PM, trader_4 wrote:
On Thursday, April 1, 2021 at 12:45:08 PM UTC-4, Murel wrote:
I have two groups of 3, 2x8's and one group of 5, 2x8's. I am running the groups of 3 for the sides and the group of 5 down the middle. Each group is 7' long and am planning on 4' wide. Do I need two layers or will one layer work? The ramp/table will need to hold 1300lbs. when I ride upon it. After I get off bike it will have approx. 1000lbs on it.

--
For full context, visit https://www.homeownershub.com/mainte...d-3108818-.htm



So one area has 3.5 ft between joists, the other 1.7 ft. I'm sure you can look up
some tables that show deflection versus spacing. My guesstimate is that one
layer is plenty for the shorter span and that you need more joists on the other span.



This can help if you enter the proper values.

https://woodbin.com/calcs/sagulator/

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On 4/2/2021 4:03 PM, Clare Snyder wrote:
On Fri, 2 Apr 2021 15:17:28 -0400, Tekkie© wrote:


On Fri, 02 Apr 2021 13:36:22 -0500, Jim Joyce posted for all of us to digest...


I haven't seen an HD trike around here, except passing through on the
Interstate. Those things tend to have two wheels in the rear, which is way
too dangerous for me. You couldn't pay me to ride one of those on the
highway since they're only stable when going in reverse. Two wheels in the
front is the way to go, when it comes to trikes.


I am not knowledgeable about trikes but it seems to me that the reverse would
be true regarding the stability. All the children's tricycles I have seen have
been single front wheel. Wouldn't that translate to full size??


Try pitting a Reliiant Robin against a Morgan or an Isetta. The
Robin will loose every time when it comes to stability - and kids
fal;l off of tricycles quite often - I know I dumped mine often enough
as a kid and had it up on 2 wheels too often to count. Braking into a
turn is almost guaranteed to dump or at least destabilize a single
front wheel trike particularly if a short wheelbase with a moderately
high center of gravity.


I'm not in the habit of braking into turns on this trike ... I may
back off the throttle a little , but accelerate thru the apex . Ya gotta
set up your line before you enter the curve . It helps a lot that our
trike is based on a Sportster Low model . I've tried a bit to lift the
inside wheel , haven't managed it yet and I'm running these nearly as
fast as on the bagger (mine has had the rear suspension modified to
eliminate swingarm movement in relation to the frame) . Or maybe my
balls just aren't big enough ...
--
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travelin' laptop

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On Sat, 3 Apr 2021 19:34:11 -0500, SNAG wrote:

On 4/2/2021 4:03 PM, Clare Snyder wrote:
On Fri, 2 Apr 2021 15:17:28 -0400, Tekkie© wrote:


On Fri, 02 Apr 2021 13:36:22 -0500, Jim Joyce posted for all of us to digest...


I haven't seen an HD trike around here, except passing through on the
Interstate. Those things tend to have two wheels in the rear, which is way
too dangerous for me. You couldn't pay me to ride one of those on the
highway since they're only stable when going in reverse. Two wheels in the
front is the way to go, when it comes to trikes.


I am not knowledgeable about trikes but it seems to me that the reverse would
be true regarding the stability. All the children's tricycles I have seen have
been single front wheel. Wouldn't that translate to full size??


Try pitting a Reliiant Robin against a Morgan or an Isetta. The
Robin will loose every time when it comes to stability - and kids
fal;l off of tricycles quite often - I know I dumped mine often enough
as a kid and had it up on 2 wheels too often to count. Braking into a
turn is almost guaranteed to dump or at least destabilize a single
front wheel trike particularly if a short wheelbase with a moderately
high center of gravity.


I'm not in the habit of braking into turns on this trike ... I may
back off the throttle a little , but accelerate thru the apex . Ya gotta
set up your line before you enter the curve . It helps a lot that our
trike is based on a Sportster Low model . I've tried a bit to lift the
inside wheel , haven't managed it yet and I'm running these nearly as
fast as on the bagger (mine has had the rear suspension modified to
eliminate swingarm movement in relation to the frame) . Or maybe my
balls just aren't big enough ...


I was talking about situations where you're doing emergency braking,
especially coupled with trying to steer around an obstacle. Heavy braking
and sudden steering inputs are a recipe for disaster when you only have a
single wheel up front. It's just physics.

Sure, emergency situations don't come up every day, but when they do you
won't want to be on a vehicle with that configuration.



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Default how much weight will two layers of 3/4" plywood hold?


On Sat, 3 Apr 2021 19:11:27 -0400, Ed Pawlowski posted for all of us to
digest...


On 4/3/2021 6:50 PM, trader_4 wrote:
On Thursday, April 1, 2021 at 12:45:08 PM UTC-4, Murel wrote:
I have two groups of 3, 2x8's and one group of 5, 2x8's. I am running the groups of 3 for the sides and the group of 5 down the middle. Each group is 7' long and am planning on 4' wide. Do I need two layers or will one layer work? The ramp/table will need to hold 1300lbs. when I ride upon it. After I get off bike it will have

approx. 1000lbs on it.

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For full context, visit https://www.homeownershub.com/mainte...d-3108818-.htm



So one area has 3.5 ft between joists, the other 1.7 ft. I'm sure you can look up
some tables that show deflection versus spacing. My guesstimate is that one
layer is plenty for the shorter span and that you need more joists on the other span.



This can help if you enter the proper values.

https://woodbin.com/calcs/sagulator/


Neat, what did we do prior to the Inet? I still have my slide rule; somewhere.

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Tekkie
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