LOCKNUT-SEAL 1G6470 - Caterpillar

Working Surfaces
The AccuGrade for Compactors System allows you to specify surfaces, other than the design surface, that provide a source of vertical guidance information. These surfaces are called working surfaces, and are used as intermediate surfaces between the unworked ground surface and the final design surface.Depending on the type of design that is loaded, the following working surfaces are available in addition to the design surface:
Reference surfaces
Layer lifts
Perpendicular lifts
Vertical liftsLike design surfaces, working surfaces can have temporary offsets applied to the surface.Reference Surfaces
Reference surfaces are included in designs when the finished surface is built up with a number of layers. For example, a road surface might be built up from four or five layers, made up of different grades of material. When the engineer prepares the road design, the engineer can specify the finished level of each layer using a reference surface.A design may contain any number of reference surfaces. Each reference surface is assigned a specific name in AccuGrade Office. Layered Lifts
The AccuGrade System uses a layered lift to define a working surface relative to the currently loaded road design. Layered lifts are only available when a road design (.dc) file is loaded.
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Filling to a road design surface using a layered lift (1) Design surface (2) Layered lift working surface (3) Intersection of layered lift and design surfaceWhen building roads, the layered lift feature enables the operator to build a road to the full width of the side slopes (batters) in lifts of a specified thickness. Layered lifts are useful when building up large fills or cutting down large cuts.Horizontal guidance is available to the intersection of the layered lift surface and the original design surface.Perpendicular Lifts
Some specialized applications require a constant thickness of material to be laid over a design surface. By using perpendicular lifts, the thickness of material is the same on sloping sections and on flat sections of a design.
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Perpendicular lift (4) Perpendicular lift working surface (5) Design surfaceIllustration 2 shows a cross-section of a perpendicular lift applied to a design surface.Vertical Lifts
A vertical lift is almost the same as a vertical offset. A vertical lift is used to specify large offsets, while a vertical offset is better for small, temporary offsets.Vertical lifts are useful when the design requires bulk cut or fill. The design can be cut away or built up in stages by working to different vertical lift surfaces until the site approaches the final design surface. When the site is close to design, a vertical offset can be applied to the original design surface.
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Vertical lift (5) Design surface (6) Vertical lift working surfaceIllustration 3 shows a "Cross-section View" with a vertical lift applied to a design consisting of level and sloping surfaces. The thickness of material is less on the sloping surface than on the level surface.