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Site: Grade, Layout & Building Stakes

const2Once you have completed your site survey, the site is cleared of trees, brush, depending on the grade of your parcel, fill dirt has to be brought in or taken away. Also, take note on the site plan, the necessary locations of utilities, electricity, and water. And do you have a proper disposal site  in place or do you know of one in the area.

  What's Next! Do you want to grade before you stake or stake before you grade or stake while you grade or is that really up to you? Do you know the answer? I've been on sites were multiple operations were all performed simultaneously and it was quite hazardous, you would not have wanted to be there, and I would not have recommended it. Is their a clear definitive  answer to this question, should we take a pole, if we stood around all day for a show of hands we wouldn't get much done would we. Our next step is to establish our perimeter lines. This is the logical step. You wouldn't  know where to start your grade operations without establishing where to begin leveling the ground for your foundation anyway, Consequently there is some leveling that is necessary before you finish grade. This is just skimming, clearing, and smoothing out the surface, then, lets get the stakes out.

  So we establish our boundaries, starting with our property lines. This critical step is usually done by a licensed surveyor will insure an accurate layout of the baseline. Let's proceed to the setback dimensions given on the site plan. Starting from one end of the property line, take the measurement from the site plan and measure the distance of the setback from the property line to the location of the baseline and drive a 2"x2" stake into the ground at this point. This marks one end of your baseline. Go to the other end and do the same. You'll have the same measurement for both ends of the property line to the baseline.

  Tie construction string to one of the stake you just placed and pull the string parallel to the property line; the amount of string needed to reach to the other stake and tied. This string should be tight. Now you have a baseline for the proposed site. Illustrated on the site plan is a previously set or established land mark, which is used to pin-point the first corner stake of the building. Measurements shown on the site plan, are taken from that marker to a location on the baseline that indicate our first building corner stake.stake

  Measure and mark this point on the string with an indelible ink marker. This is the exact location of the first corner of the building. Drive a 2"x2" stake deep into the ground at this spot, just below and centered on the mark of the string. Use a plumb-bob, and drop it to the top of the stake, perpendicular to the mark on the string. Next, mark the position of the plumb-bob on the top of the stake. Nail an 10 penny finish nail, where you marked the top of the stake and drive it into the top of the stake, designating the exact location of the corner.Bat3

  Once you have this location established, your ready to proceed with the rest of the building stakes. Now, measure the length of the building, starting from the first corner mark located on the building line, measure the specific length listed on the site plan and mark that point on the building line for your second corner stake. Drive the stake into the ground, centering the stake below the mark as you did with the first stake, using the plumb-bob etc.

  All your building stakes will be installed in a similar fashion and we will consider the rest of the layout next time for the rest of the story.

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Soils Types & Characteristic

dirt1

What's The Big Deal About Dirt?

  I decided to take a pause for the cause; and talk a bit on the topic of soil. This is where it all begins, and is literally the base; foundation for the foundation; and ground for the most important of all topics. It is the lead player of the critical roll in construction. If it goes wrong here or fails, the whole system falls; literally falls; or debilitates the whole structure on which the whole framework stands. For this reason, lets take a moment to look at soil profile and characteristics, and ponder the intrinsic aspects of the subject, and search the reasons why it could be detrimental to disregard basic standard procedures and to neglect the proper steps that must be applied.dirt3

  First and foremost, the foundation of the house, and the ground on which it stands; properly understood with accurate engineering principles applied, bears it's own weight in gold. The study of soil, is worth the time to recognize certain natural characteristics, how it reacts under stress and responds to determined loads, a science all by itself. Interesting!

  Load bearing capacity of soil varies according to it's composition and water content, the higher ratio of water to soil degrades it's capacity to bear heavy loads. You would see this if you watch a work site with equipment drivers working the site. On a dry day there is no problems, but after a rain you'll observe the tracks of the heavy equipment sink into the ground and mush out from between the tire treads. The same principle applies.dirt7

  Soil is made of large or small particles derived from one or more minerals that make up solid rock and the various types are determined by the size of it's particles.


Rock Classificationrock2

Group:  Igneous (Intrusive)

Characteristics

Granite;  mostly quartz and potassium feldspar with mica, pyroxene, and amphibole

   Environment:  Deep-seated, coarse-grained pluton

Syenite;   mostly potassium feldspar with mica, pyroene, and amphibole

   Environment:  Deep-seated, medium grained pluton

Monzonite;   plagioclase and potassium feldspar with mica, pyroxene, and amphibole

   Environment:  Deep-seated, course-grained pluton

Diorite;   mostly plagioclase and quartz with abundant mica, pyroxene, and amphibole

   Environment:  Deep-seated, course-grained pluton 

Gabbro;   equal amounts of plagioclase and mica, pyroxene, and amphibole

   Enviornment: Intermediate-depth, medium- to coarse-grained pluton

Peridotite;  mostly olivine, pyroxene, and amphibole with little plagioclase

   Environment:  Very-deep-seated medium- to fine-grained pluton


Group:  Igneous (Extrusive)rock3

Characteristics

Rhyolite;  mostly quartz and potassium feldspar with mica, pyroxene, and amphibole

   Environment:  Fine-grained fissure or volcanic eruption

Andesite;  mostly plagioclase and quartz with abundant mica, proxene, and amphibole

   Enviornment:  Fine-grained fissure or volcanic eruption

Basalt;  equal amounts of plagioclase and mica, pyroxene, and amphibole 

   Enviornment:   Fine-grained fissure or volcanic eruption


Group:  Metamorphic ( Foliated )rock1

Classification

Gneiss;  mostly quartz and feldspar with mica, and amphibole

   Environment:  Course-grained, deep-seated

Schist;  mostly mica and platy minerals with less quartz and feldspar

   Environment:  Course-grained, deep-seated

Phyllite;  micaceous rock intermediate between schist and slate

   Enviornment:  Medium-grained, moderate depth

Slate;  feldspar, quartz, and micaceous minerals

   Enviornment:  Fine-grained, moderate-depth


Group:  Metamorphic  ( Nonfoliated )rock7

Classification

Hornfels;  metamorphic clay materials

   Environment:  Contact with hot magma bodies

Marble;  metamorphic carbonates

   Environment:  Course-grained, deep-seated

Quartzite;  metamorphic sandstone

   Environment:  Fine-grained, deep-seated


Group:  Sedimentary  ( Clastic )rock9

Classification

Conglomerate;  fragments of rounded gravel-sized sediments

  Environment: River and glacial deposits

Breccia;  fragments of angular gravel-size sediments

  Environment:  River and volcanic deposits

Sandstone;  coarse-grained quartz and feldspar with minor accessory minerals

  Environment:  Marine and river deposits

Siltstone;  fine-grained quartz and feldspar with minor accessory minerals

  Environment:  Marine, lake, and river deposits

Shale;  very-fine-grained sediments, mostly feldspar

  Environment:  Marine and lake deposits


Group:  Sedimentary  ( Nonclastic )dirt6

Classification

Limestone;  calcium carbonate, often with skeletal fragments

  Environment:  Marine and lake deposits

Dolomite;  calcium magnesium carbonaterock8

  Environment:  Marine deposits and veins

Gypsum;  hydrous calcium sulfate

  Environment:  Near-shore brine pools

Chalcedony;  microscopic silica

  Environment:  Deep marine and groundwater


Soil types, as determined by particle size

  • Cobbles and boulders: larger than 3 inches in diameter.
  • Gravel: smaller than 3 inches and larger than number 4 seize ( approximately 1/4 inch ).
  • Sand: particles smaller than number 4 seize and larger than 200 seize ( 40,000 openings per square inch ).
  • Silts: particles smaller than 0.02 millimeters (mm) and larger than 0.002 mm in diameter.
  • Clay: particles smaller than 0.002 mm in diameter.

  Having lived in New Mexico where the ground is very hard and dry, subject to flash-flooding. The soil bears looking at and to make a point, you don't have to go far in the desert to find sinkholes in the ground. These are areas in the soil where water streams flow underneath the soil and washes the  lower layers of soil away from underneath and after a short time it caves in.

  These cave-ins serve to point out the fact that a thorough surface and subsurface investigation should be performed to establish criteria for the foundation requirements of the proposed structure.sink2

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Please leave a comment let me know what you think.


 

 
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