Go to Post It's a hunch, based on engineering intuition; there are too many hard-to-quantify variables to do any accurate calculations. Looking for some experimental corroboration or refutation. - Ether [more]
Home
Go Back   Chief Delphi > FIRST > General Forum
CD-Media   CD-Spy  
portal register members calendar search Today's Posts Mark Forums Read FAQ rules

 
Reply
Thread Tools Rate Thread Display Modes
  #1   Spotlight this post!  
Unread 07-01-2014, 11:29
Phyrxes's Avatar
Phyrxes Phyrxes is offline
Has done the math, have you?
AKA: Dave Button
no team (No Team, Changed Schools)
Team Role: Teacher
 
Join Date: Dec 2007
Rookie Year: 2007
Location: Gainesville VA
Posts: 489
Phyrxes has a brilliant futurePhyrxes has a brilliant futurePhyrxes has a brilliant futurePhyrxes has a brilliant futurePhyrxes has a brilliant futurePhyrxes has a brilliant futurePhyrxes has a brilliant futurePhyrxes has a brilliant futurePhyrxes has a brilliant futurePhyrxes has a brilliant futurePhyrxes has a brilliant future
Team field elements question

I'm looking to order a drop shipment of lumber so my parents can assemble the team field elements, does anybody have a handy list of how much 3/4" plywood and other materials they used before I sit down and figure it out?

Pointing me to a materials list if one exists would also be awesome as I may have missed it.

Thanks!
__________________
Dave Button
Physics and Mathematics Teacher
Wakefield School
The Plains, VA

“Simplify and add lightness.”
― Colin Chapman, Team Lotus
Reply With Quote
  #2   Spotlight this post!  
Unread 07-01-2014, 15:41
Aur0r4's Avatar
Aur0r4 Aur0r4 is offline
Engineering Mentor
AKA: Jim Browne
None #1058 (PVC Pirates)
Team Role: Engineer
 
Join Date: Mar 2005
Rookie Year: 2002
Location: Londonderry, NH
Posts: 65
Aur0r4 has a brilliant futureAur0r4 has a brilliant futureAur0r4 has a brilliant futureAur0r4 has a brilliant futureAur0r4 has a brilliant futureAur0r4 has a brilliant futureAur0r4 has a brilliant futureAur0r4 has a brilliant futureAur0r4 has a brilliant futureAur0r4 has a brilliant futureAur0r4 has a brilliant future
Send a message via AIM to Aur0r4
Re: Team field elements question

We used a full sheet for most of the parts, but might need a bit more to finish it. 2 would do it, I think. I think we had two sheets of the half inch, but we were just making one goal. The truss is ridiculous.

I would suggest trying to substitute something like 1x lumber for most of the 3/4" pieces. You basically rip an entire sheet of 3/4" plywood into various 1x2's, 1x4's and 1x8's.

The team field drawings are becoming more ridiculous as the years go on. It is very clear they are made by someone who has not built very much out of wood and probably never actually priced materials at home depot.

This year's drawings are a doozie.
__________________
Jim Browne, EIT
Team 1058 - PVC Pirates
Reply With Quote
  #3   Spotlight this post!  
Unread 07-01-2014, 15:59
rsisk's Avatar
rsisk rsisk is offline
The GURU Channel
AKA: Richard Sisk
FRC #2493 (Robokong)
Team Role: Mentor
 
Join Date: Jan 2008
Rookie Year: 2007
Location: Riverside, CA
Posts: 2,750
rsisk has a reputation beyond reputersisk has a reputation beyond reputersisk has a reputation beyond reputersisk has a reputation beyond reputersisk has a reputation beyond reputersisk has a reputation beyond reputersisk has a reputation beyond reputersisk has a reputation beyond reputersisk has a reputation beyond reputersisk has a reputation beyond reputersisk has a reputation beyond repute
Send a message via MSN to rsisk
Re: Team field elements question

Some tips here in this thread: http://www.chiefdelphi.com/forums/sh...d.php?t=123993

We ordered 5 sheets of 1/2", 3 sheets of 3/4", and 11 2x4.

If you want to build all the elements.
__________________
Quote:
The views expressed are mine and should not be construed to represent the views of anyone else.
Reply With Quote
  #4   Spotlight this post!  
Unread 07-01-2014, 19:14
Phyrxes's Avatar
Phyrxes Phyrxes is offline
Has done the math, have you?
AKA: Dave Button
no team (No Team, Changed Schools)
Team Role: Teacher
 
Join Date: Dec 2007
Rookie Year: 2007
Location: Gainesville VA
Posts: 489
Phyrxes has a brilliant futurePhyrxes has a brilliant futurePhyrxes has a brilliant futurePhyrxes has a brilliant futurePhyrxes has a brilliant futurePhyrxes has a brilliant futurePhyrxes has a brilliant futurePhyrxes has a brilliant futurePhyrxes has a brilliant futurePhyrxes has a brilliant futurePhyrxes has a brilliant future
Re: Team field elements question

I have ballpark amount of lumber to order, I'll post how much of each we use but we are only building the low goal and the high goal.
__________________
Dave Button
Physics and Mathematics Teacher
Wakefield School
The Plains, VA

“Simplify and add lightness.”
― Colin Chapman, Team Lotus
Reply With Quote
  #5   Spotlight this post!  
Unread 07-01-2014, 19:51
swwrobotics's Avatar
swwrobotics swwrobotics is offline
Registered User
FRC #2900 (The Mighty Penguins)
Team Role: Mechanical
 
Join Date: Jan 2011
Rookie Year: 2011
Location: Washington D.C.
Posts: 112
swwrobotics is an unknown quantity at this point
Re: Team field elements question

We built all the elements as simply as possible in the team drawings. We used 2 full 3/4" sheets and one 1/2" sheet to build the small and large goal. We also had to get about a quarter of another 1/2" sheet to form the bases for the 2x4s which hold up strings in the same span area of the truss.

It was a bit difficult to tessellate all the cuts in the sheets and we messed up a lot and forgot to do certain cuts, so having extra plywood wouldn't hurt if you made an error. Also, as a tip, remember to cut your pieces in the direction of the grain of your plywood, otherwise your long pieces will be all flimsy. That is how you'll get the most strength out of it and be able to build a good field!
Reply With Quote
  #6   Spotlight this post!  
Unread 07-01-2014, 19:56
sanddrag sanddrag is offline
On to my 16th year in FRC
FRC #0696 (Circuit Breakers)
Team Role: Teacher
 
Join Date: Jul 2002
Rookie Year: 2002
Location: Glendale, CA
Posts: 8,519
sanddrag has a reputation beyond reputesanddrag has a reputation beyond reputesanddrag has a reputation beyond reputesanddrag has a reputation beyond reputesanddrag has a reputation beyond reputesanddrag has a reputation beyond reputesanddrag has a reputation beyond reputesanddrag has a reputation beyond reputesanddrag has a reputation beyond reputesanddrag has a reputation beyond reputesanddrag has a reputation beyond repute
Re: Team field elements question

1 sheet of 1/2 and 1 sheet of 3/4 and 12 8-foot 2x4s for the high goal.
__________________
Teacher/Engineer/Machinist - Team 696 Circuit Breakers, 2011 - Present
Mentor/Engineer/Machinist, Team 968 RAWC, 2007-2010
Technical Mentor, Team 696 Circuit Breakers, 2005-2007
Student Mechanical Leader and Driver, Team 696 Circuit Breakers, 2002-2004
Reply With Quote
  #7   Spotlight this post!  
Unread 07-01-2014, 20:07
EricH's Avatar
EricH EricH is offline
New year, new team
FRC #1197 (Torbots)
Team Role: Engineer
 
Join Date: Jan 2005
Rookie Year: 2003
Location: SoCal
Posts: 19,823
EricH has a reputation beyond reputeEricH has a reputation beyond reputeEricH has a reputation beyond reputeEricH has a reputation beyond reputeEricH has a reputation beyond reputeEricH has a reputation beyond reputeEricH has a reputation beyond reputeEricH has a reputation beyond reputeEricH has a reputation beyond reputeEricH has a reputation beyond reputeEricH has a reputation beyond repute
Re: Team field elements question

Not sure what we used on the high goal, but on the truss we just built a pair of stanchions out of 2x4 and tied string across to the right length.
__________________
Past teams:
2003-2007: FRC0330 BeachBots
2008: FRC1135 Shmoebotics
2012: FRC4046 Schroedinger's Dragons

"Rockets are tricky..."--Elon Musk

Reply With Quote
  #8   Spotlight this post!  
Unread 07-01-2014, 20:10
Muffinz's Avatar
Muffinz Muffinz is offline
Registered User
FRC #0088 (Tj (squared))
Team Role: Student
 
Join Date: Mar 2011
Rookie Year: 2008
Location: US
Posts: 13
Muffinz is an unknown quantity at this point
Re: Team field elements question

My family and I built the field for my old team this past weekend, it took 1 sheet of 1/2" plywood, 3 sheets of 3/4" plywood, and probably 10-15 2X4's

We made some adjustments to the truss and the high goal.

The truss we created is only 8ft long, no need for a 26" truss...

The High goal that FIRST wants teams to make is not safe in our opinions so we added extra supports along the back and the sides.

We are fortunate enough to have a master craftsman in the family and he pointed out numerous flaws in the designs first gave out.

1. When laminating the the plywood together be sure to use ample wood glue. the glue is what gives the field elements strength. We chose to couple that with 1 1/2" staples.

2. On the high goal and the low goal the spec calls for you to drill into the side of the laminated plywood, we would highly recommend you do not do this, it yield no strength and will just split the wood and make more prone to break and hurt a person standing by it.

3. Don't build the truss supports the way they have them shown, once again we found that they are crap, the way FIRST has you assemble them terrible. We decided to just use 2 4X4's as each support/pylon.

4. Brace that high goal... it isn't safe to build it the way they have it. We chose to do two things. The first being we ran a long piece of plywood along the back where the lower support connects the the actual goal. We used 3 inch nails which insures it isnt going anywhere. We also added two 12' 2X4's running from the top of the goal to the horizontal support pieces on the ground making one big triangle.

We had very little waste so make sure if you buy this amount of material you map out your cutlist before cutting your plywood.

Good Luck
Reply With Quote
  #9   Spotlight this post!  
Unread 07-01-2014, 22:22
quad quad is offline
Registered User
FRC #1218
 
Join Date: Mar 2013
Location: PA
Posts: 23
quad is an unknown quantity at this point
Re: Team field elements question

For the high goal we used:
about 75% of one sheet of 1/2 ply
about 85% of one sheet of 3/4 ply
4 2x4x10
4 2x4x8

For the low goal:
most of one sheet of 3/4 ply

This assumes you are following the plans as presented.

You can use a free cutlist program to give you a cutting diagram.

The high goal is top heavy; consider some additional supports/anchors.
Reply With Quote
  #10   Spotlight this post!  
Unread 08-01-2014, 09:37
E Dawg E Dawg is offline
... is not done with FRC yet.
AKA: Ethan
FRC #0159 (Alpine Robotics)
Team Role: Mentor
 
Join Date: Feb 2013
Rookie Year: 2012
Location: Fort Collins, CO
Posts: 267
E Dawg has much to be proud ofE Dawg has much to be proud ofE Dawg has much to be proud ofE Dawg has much to be proud ofE Dawg has much to be proud ofE Dawg has much to be proud ofE Dawg has much to be proud ofE Dawg has much to be proud ofE Dawg has much to be proud of
Re: Team field elements question

Remember that your field elements don't have to be exactly the same as those at competition. Last year we just had a single rectangle on a stick to simulate the goal. Just make sure your dimensions are correct.

Also, the truss may be a little difficult (okay, a LOT difficult). It may be easier to use a beam that is raised so that the top of the beam is the same height as the top of the truss. Not necessarily pretty, but it gets the job done.
Reply With Quote
  #11   Spotlight this post!  
Unread 08-01-2014, 11:19
Roger Roger is offline
Registered User
FRC #1153
 
Join Date: Jan 2006
Rookie Year: 1900
Location: Walpole MA
Posts: 688
Roger has a reputation beyond reputeRoger has a reputation beyond reputeRoger has a reputation beyond reputeRoger has a reputation beyond reputeRoger has a reputation beyond reputeRoger has a reputation beyond reputeRoger has a reputation beyond reputeRoger has a reputation beyond reputeRoger has a reputation beyond reputeRoger has a reputation beyond reputeRoger has a reputation beyond repute
Re: Team field elements question

We did the rope version of the truss. Much cheaper. Though I'm curious as to the cost of a wood I-beam, or a homemade version of same.

We might be getting an extra plywood sheet to put low on the overhead goal wall (like the base wall for the drivers). and a second net in the middle section (first net behind the goal). Only because our programming table/station is four feet behind the goal wall.

Gotta protect the programmer's laptops and monitors. (We do have hard-hats left over from last year for the programmers.)
Reply With Quote
Reply


Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -5. The time now is 06:29.

The Chief Delphi Forums are sponsored by Innovation First International, Inc.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Copyright © Chief Delphi