The first step in using a string line for our paver project is to put a stake in the corners of our project. These can be simply wooden stakes or metal spikes that can be hammered and stabilized into the ground. We use a metal spike because we also use a collar that tightens to that circular spike that allows the string line to tighten around it easily and to move up and down as needed.
With conventional string liners, the process is vulnerable to human error. Automated and robotic stringlines help remove that human variable and increase accuracy.
Machine Control in Concrete Applications technologies range from 2D and 3D grade control to automation, robotic control, and augmented reality.
GPS/3D control – eliminating the need for placing stringline by hand – is becoming an industry norm, Stephen Bulluck, Power Curbers president, pointed out.
These technologies address challenges such as a shortage of qualified labor, an increased productivity demand to address the backlog in building or repairing infrastructure, and a need to increase profitability.
This story noted how GPS improves labor and resource allocation, how the strategic use of 3D-printed components improves site efficiency, and how its sensors yield more visibility into geography and structures.
These technologies offer the needed boosts in productivity and ROI as well as increased machine efficiency and safety.
The GOMACO company noted true 3D eliminates human error that can be involved with setting a physical stringline as 3D works from a digital model with a virtual stringline, a constant that cannot be physically changed.
Conventional stringlines are prone to displacement, as equipment or people can accidentally hit the lines, causing stringline movement and paving errors. Errors may come from the surveyor’s grade control stakeouts, the company pointed out.
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