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Clear zone and guardrails (NBR 15486) Beta

Upload the terrain surface and the alignment in LandXML (exported from Civil 3D, for example). The analysis cuts one section per station, on both sides, classifies the slope by NBR 15486 and shows the guardrails as the CapCad guardrail batch would draw them. It is the same CapCad engine as for AutoCAD and Civil 3D; in CAD there are also Civil 3D surfaces, corridors, road edges and insertion into the drawing.

Data

Surface (LandXML) Alignment (LandXML, optional: otherwise the one in the surface file)

Alignment

Design speed (km/h) AADT

Carriageway width (m, total)

Analysis

Step (m) Extrapolation (m)

Embankment ok: repeat the section with L = 18 m Waive embankments with H < 0.9 m Fixed Kcz when the speed/radius pair is not in the norm Fixed Kcz

Guardrails

Offset (m) Maximum gap (m)

Extra length (m) Include non-critical embankment

cut / flat embankment ok critical not analysed clear zone guardrail governing pair

no station critical only Vertical exaggeration drag = pan, wheel = zoom, click a section line = the section