How do you install paver string lines?
Position the stringline stakes about 1 foot in-front of each grade hub. The stringline should then be 12 to 18 inches away from the edge of the concrete. Also, locate the stringline 0 to 24 inches above the top of the concrete.
What is a string line construction?
Line levels (or “string” levels) are a special brand of spirit level used for leveling across longer distances. They can be attached to a tightly pulled string to find level between two stakes in the ground to find level ground.
How do you keep pavers in a straight line?
Begin laying pavers at a 90-degree corner, preferably one that abuts the house or another structure. Work out from there, keeping your pavers in straight lines. Lay pavers by placing them straight down in the sand–do not slide them along the ground or kick them into place and disturb the sand.
How do you level ground by hand for pavers?
Dampen the sand lightly with water from a hose sprayer. Smooth the damp sand with a rake. Tamp the sand with a hand tamper to flatten it. Check the top of the sand for levelness with the carpenter’s level, and move sand as needed until the top of the sand is level.
How are stringlines used in slip form pavers?
Stringlines are what slip-form pavers and trimmers sense. A paver has two wands to sense and control its position: one for elevation and one for alignment. The elevation-sensing wand rides against the bottom of the string while the alignment-sensing wand rides against the inside of the string.
How is a concrete slip form paver machine used?
Concrete slip form paver machines are used to pave construction works in which concrete is poured into a continuously moving form. The construction materials are continuously prepared and poured over the paving surface and the leveling is done simultaneously.
How do you set string lines in concrete?
Pins hold the stringline in place. They are pounded into the ground 12 inches from the hub (the hub is between the pavement and the pin). Then a horizontal bar called a “string line wand” is attached to the pin. It’s located 2 feet above the surface of the subgrade (identified on the hub) with the string location directly over the hub.
What kind of pavers are used for PCC?
The concrete slip form pavers machines are used for this type of topping. Concrete slip form pavers spread out, form and, depending on attachments, apply an initial finish to the surface of low-slump Portland cement concrete (PCC).