Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help



Go Back   PeachParts Mercedes-Benz Forum > General Discussions > Off-Topic Discussion

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 04-27-2018, 11:05 AM
greazzer's Avatar
dieselfuelinjector.guru
 
Join Date: Sep 2010
Location: 2021 - The Great Florida Count-down
Posts: 5,615
Any construction folks out there ? Need help please

Is there a pretty much fool proof way to get pin point measurements?

I need to dig four or five footers, 2' x 2' and go down maybe a foot max. No frost line in SC and most houses don't go down more than a foot from what I have seen.

I want to enlarge my deck.

I want to measure 16' off from the back of my house. I want to make sure that the footings' centers are 90* or perfectly perpendicular to the house. I could use string, measure, the trick of 3, 4, and 5, et cet., but wondering if anyone has used a laser device or other contraptions? Been a while since I frammed or worked in this realm and wanted to see what folks actually use these days.

Deck will be 16' x 20'

Reply With Quote
  #2  
Old 04-27-2018, 11:23 AM
t walgamuth's Avatar
dieselarchitect
 
Join Date: Apr 2005
Location: Lafayette Indiana
Posts: 35,525
Hi Mark,
I understand you don't worry about frost but be sure to get down to soil that is good bearing, meaning not too much organic material in it to deteriorate and let your footing settle. Also building so it could be shimmed later would be a good though too.

1. Pick your points for the outermost portion of your deck on each side, then
2. establish where your two outer corners will be (assuming the deck is rectangular) and put in a temporary stake or marker then measure the diagonals from the point on the house.
3. then adjust your stakes until the diagonals are equal. It should be square at that point, meaning 90 degree angles at each corner.

If the deck is irregular you can start this way then measure off the strings tied from corner to corner to establish points inside the perimeter. Its not hard, just dig in and it will become apparent.....easy compared to the mechanical adventures you do all the time on our mercedes diesels.

Feel free to pm if clarity is not immediate.
__________________
[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.
Reply With Quote
  #3  
Old 04-27-2018, 11:25 AM
greazzer's Avatar
dieselfuelinjector.guru
 
Join Date: Sep 2010
Location: 2021 - The Great Florida Count-down
Posts: 5,615
yes, rectangle, but the problem is that I have 10 x 10 deck in the way ... lol
Reply With Quote
  #4  
Old 04-27-2018, 11:33 AM
greazzer's Avatar
dieselfuelinjector.guru
 
Join Date: Sep 2010
Location: 2021 - The Great Florida Count-down
Posts: 5,615
I will see if I can work with it .... thanks Tom
Reply With Quote
  #5  
Old 04-27-2018, 11:43 AM
t walgamuth's Avatar
dieselarchitect
 
Join Date: Apr 2005
Location: Lafayette Indiana
Posts: 35,525
You'll figure it out.
__________________
[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.
Reply With Quote
  #6  
Old 04-27-2018, 12:14 PM
Diseasel300's Avatar
Registered User
 
Join Date: May 2016
Location: Texas Hill Country
Posts: 5,189
Measure out from the house the distance you want to go, then measure diagonally from corner to corner. The diagonal measurement will confirm perfect 90˚ corners if your measurement from the house is known. We did this recently when pouring a slab for a gazebo and turned out a perfect 20x25 slab.
__________________
'11 Honda Accord EX - "The Daily" 70K
'83 500SL Euro - "The Money Pit" 116K
'91 350SD - "Diseasel Jr." 173K
'94 BMW 525i - "The Red Car" 180k
Reply With Quote
  #7  
Old 04-27-2018, 12:44 PM
greazzer's Avatar
dieselfuelinjector.guru
 
Join Date: Sep 2010
Location: 2021 - The Great Florida Count-down
Posts: 5,615
Doesn't the measure diagonally assume that your first "line" is already perpendicular? That is, If I start on the left side and measure out 16' and try to eye ball it, then go to the right side and do the same thing, I am assuming I will be somewhat close. Then, if I take a diagonal measurement each way (a giant X from above looking down) wouldn't I still need to make sure that my first side I started with was 90* to start with?

It just stopped raining here so I am thinking I will try my measurments and markings tomorrow. I got some steel stakes and string.
Reply With Quote
  #8  
Old 04-27-2018, 01:07 PM
tyl604's Avatar
Registered User
 
Join Date: Feb 2008
Location: Atlanta, GA
Posts: 3,295
No. If you measure out from the house, the diagonals will make you adjust so you get a perfect square. If you mismeasure one side, then it cannot by definition be square, that is a perfect rectangle.

Don't overthink it; is simple. I do this almost every Saturday for Habitat.
Reply With Quote
  #9  
Old 04-27-2018, 01:35 PM
greazzer's Avatar
dieselfuelinjector.guru
 
Join Date: Sep 2010
Location: 2021 - The Great Florida Count-down
Posts: 5,615
So, in other words, if I go from the exact spot I want to start, measure out 16' and do the same on the other side, I just go back and forth with a diagonal measurement until each arm of the "X" is the same?
Reply With Quote
  #10  
Old 04-27-2018, 01:51 PM
t walgamuth's Avatar
dieselarchitect
 
Join Date: Apr 2005
Location: Lafayette Indiana
Posts: 35,525
Quote:
Originally Posted by greazzer View Post
So, in other words, if I go from the exact spot I want to start, measure out 16' and do the same on the other side, I just go back and forth with a diagonal measurement until each arm of the "X" is the same?
Exactly right.
__________________
[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.
Reply With Quote
  #11  
Old 04-27-2018, 02:08 PM
cmac2012's Avatar
Renaissance Dude
 
Join Date: Dec 2004
Location: Berkeley, CA
Posts: 19,232
I can't get a good picture in my mind of what you mean by the deck in the way but it might be easier to first establish one perpendicular line.

Perhaps the 5, 12, 13 triangle would work. Or you could use any numbers.

You want to go out 16 feet. Say you have 6 feet you can use easily going parallel to the house. 16^2 + 6^2 = 292. Square root of that is 17.09, or about 17-1/16. Maybe get a 16 foot wire arrangement (stretches less than string), pull it out from the point and play with moving it side to side until you get the 17 foot mearsurment from the 6 foot spot.

I could imagine that using diagonols on both sides from the start could be lot of moving around. If you establish one perpindicular, will be quicker to use diagonols to get the other one and then check it against itself. Also, consider that an equilateral trapezoid will have matching diagonals.



To avoid that you would also need to make sure that BC = AD. Using diagonals would be easier, I'm thinking, on laying out a rectangular form as you have the four sides of your rectangle in place, in that case BC will = AD. In your case, the line BC is sort of floating at this point, assuming that the line AD is the wall of your house.
__________________
cmac

1986 300SDL, 351K
1984 300D, 133K
Reply With Quote
  #12  
Old 04-28-2018, 02:55 PM
Banned
 
Join Date: Dec 2007
Posts: 5,061
Located this book on my bookshelf, it appears to be very informative on this subject.....

https://www.amazon.com/Decks-Porches-Patios-Repair-Improvement/dp/B0074CXPWC/ref=sr_1_1?ie=UTF8&qid=1524941636&sr=8-1&keywords=time+life+decks+porches
Reply With Quote
  #13  
Old 05-01-2018, 08:03 PM
Registered User
 
Join Date: Mar 2008
Location: CT
Posts: 260
Checking the diagonals is where it's at for square.
As to plumb, that's a whole different issue!
__________________
95 E300D working out the kinks
77 300D, 227k, station car
83 300CD 370k, gone away
89 190E 2.6- 335k, no more
79 VW FI Bus- 145k miles, summer driver
59 VW Beetle ragtop- 175k miles
12 VW Jetta- 160k miles
Reply With Quote
  #14  
Old 05-02-2018, 07:56 AM
greazzer's Avatar
dieselfuelinjector.guru
 
Join Date: Sep 2010
Location: 2021 - The Great Florida Count-down
Posts: 5,615
Quote:
Originally Posted by cmac2012 View Post
I can't get a good picture in my mind of what you mean by the deck in the way but it might be easier to first establish one perpendicular line.

Perhaps the 5, 12, 13 triangle would work. Or you could use any numbers.

You want to go out 16 feet. Say you have 6 feet you can use easily going parallel to the house. 16^2 + 6^2 = 292. Square root of that is 17.09, or about 17-1/16. Maybe get a 16 foot wire arrangement (stretches less than string), pull it out from the point and play with moving it side to side until you get the 17 foot mearsurment from the 6 foot spot.

I could imagine that using diagonols on both sides from the start could be lot of moving around. If you establish one perpindicular, will be quicker to use diagonols to get the other one and then check it against itself. Also, consider that an equilateral trapezoid will have matching diagonals.



To avoid that you would also need to make sure that BC = AD. Using diagonals would be easier, I'm thinking, on laying out a rectangular form as you have the four sides of your rectangle in place, in that case BC will = AD. In your case, the line BC is sort of floating at this point, assuming that the line AD is the wall of your house.

Hey, thank you !

Right now, I have a 10 x 10 deck. I need to tear it down and replace it but I am replacing it with a 16 x 22 deck. I do not want to remove the current deck until I dig the "footers" (12 x 12 concrete going down maybe 12" to 18" max). Using 6x6 posts vs. 4x4. I can dig and put in place the side ones and the ones on the 'outside.' By keeping the old deck in place, I am not getting yelled at by my family for not having a deck. Once the footers are in place, cured for a week or two. I can set those posts on metal plates although not 100% permantly -- I can make fine tuned adjustments. I can do the tear down in half a day and do the clean up and probably the other half of the day install the outside perimeter. Having the footers on the money will make this painless for me.
Reply With Quote
  #15  
Old 05-02-2018, 07:57 AM
greazzer's Avatar
dieselfuelinjector.guru
 
Join Date: Sep 2010
Location: 2021 - The Great Florida Count-down
Posts: 5,615
Quote:
Originally Posted by HuskyMan View Post
Thanks ! and thanks to everyone.

Did some string magic over the weekend, and figured out what Tom (and others) are talking about.

Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

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

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -4. The time now is 06:13 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page