How do you read Slope Stakes?
Measure the distance from the bottom of the lower stake to the string and the distance between the top and bottom stakes . Use those to figure the angle; a 33 percent grade, for instance, will drop 1 foot for every 3 feet of distance. Measure the angle on the side of the step area if the ground slopes both ways.
How do you set grade stakes?
How to Set Grade Stakes Pound grade stakes into the ground on each end of the area you need sloped. Determine the desired grade —typically 1-2% (1/8″ per foot to 1/4″ per foot) is enough to provide enough runoff. Tie a string at a fixed height on the hinge.
How do you read survey elevations?
To find an elevation , simply set the rod foot at any location on the job within the range of your laser or optical instrument. Run the detector and / or front rod section up or down until you pick up the “on grade” signal from your detector. Read the number opposite the pointer. That number is your true elevation .
What does a grading plan look like?
A Typical Grading Plan An average grading plan shows the slope of the lot, displaying it in five-foot increments. It gives the site supervisor with the needed information for managing and inspecting the grading .
What is a grading plan in construction?
A grading plan refers to the landscaping of the house site and soil elevations. A typical grading plan will show the slope of the lot in 5-foot increments, and can provide the site supervisor with the specific information needed for inspecting and managing the grading trade contractor.
What is a 4 1 slope?
For example, ” slopes are expressed as ratios such as 4 : 1 . This means that for every 4 units (feet or metres) of horizontal distance there is a 1 unit (foot or metre) vertical change either up or down.”
How do you find a level of a slope?
How do you calculate the percentage grade of a slope ? Slope can be calculated as a percentage which is calculated in much the same way as the gradient . Convert the rise and run to the same units and then divide the rise by the run. Multiply this number by 100 and you have the percentage slope .
What is a 6% grade?
A road sign indicating a 6 % grade , or 6 % slope. A six percent slope means that the road elevation changes 6 feet for every 100 feet of horizontal distance (Figure 1.3). A road climbs at a gradient of 6 percent. The road gains 6 feet in elevation for every 100 feet of horizontal distance.
What does a 5% grade look like?
Grades are often measured by how high up you go as you progress horizontally. For example, a wheelchair-navigable trail is no more than a five-foot rise in one hundred feet horizontally. This is called a 5 percent grade (i.e., five divided by 100).
What do Survey stakes mean?
Precise location markings: Stakes like this will usually have a steel pin also associated with it. This stake gives the latitude, longitude, and elevation of the site. Precise location stake.
Is a line lying in a level surface?
Explanation: A level line is a line lying in a level surface . It is, therefore, normal to the plumb line , at all points. Explanation: Horizontal plane through a point is a plane tangential to the level surface at that point. It is, therefore, perpendicular to the plumb line through the point.
How do you shoot elevations at a level?
As important as it is, shooting grade is simple. Set up the tripod of the laser level or transit; spread the three legs, each an equal distance from the other two. Position you partner within the building site or in the pipe trench. Set the grade rod at different locations on the site.
What does FS mean in surveying?