# VectorPaint stepladder side views: distinguish top hinge, legs and spreader

Language: en
Canonical: [VectorPaint stepladder side views: distinguish top hinge, legs and spreader](<https://allluckly.cn/en/guides/vectorpaint-stepladder-top-hinge-spreader-side-diagram/>)
中文：[中文 HTML](<https://allluckly.cn/guides/vectorpaint-stepladder-top-hinge-spreader-side-diagram/>)
English: [English HTML](<https://allluckly.cn/en/guides/vectorpaint-stepladder-top-hinge-spreader-side-diagram/>)
Published: 2026-11-13T00:00:00+08:00
Modified: 2026-11-13T09:43:51+08:00
Author: Bison

Use two static icons to check a stable hinge and a two-ended spreader without treating dimensions as use or manufacturing specifications.

English translation of the [Chinese original](<https://allluckly.cn/guides/vectorpaint-stepladder-top-hinge-spreader-side-diagram/>), translated on 2026-11-13. Original publication dates, attribution, code and version notes are retained.

Draw an invented A-frame stepladder in side view, distinguishing climbing side, rear support, top hinge and opening spreader. Actual use depends on manufacturer instructions and physical condition. This image certifies no load, stability or locking performance; rotating drawing objects is not mechanical simulation.

## Declare a side view rather than a complete four-foot view

Use a 1600×1000 canvas with an open side view left and a nearly folded structural comparison right. State that left and right front stiles can overlap in projection: the two main diagonals represent front and rear sides, not proof of only two real feet. The [HSE ladder guide](<https://www.hse.gov.uk/work-at-height/ladders/types-of-ladder.htm>) distinguishes ladder types and locking components; use it only for component roles, not copied working angles or loads. Separate hinge, front side, rear side, spreader and labels, without adding a climbing person.

## Set one shared top-hinge reference

Mark hinge H. Extend the front side down-left and rear side down-right, with feet on one invented ground line. Use narrow strips instead of infinitely thin lines, separating thickness edges near H by occlusion without two floating top ends. Dimensions are layout conventions. Establish centre directions with thin guides before solid edges. If one side unexpectedly shortens, check accidental dragging rather than silently switching viewpoint to explain a disconnected joint.

## Attach step ends to the climbing side

Add three illustrative steps to the front side, showing short horizontal thick edges extending inward. Label these as side projections, not full frontal widths. Do not extend every step to the rear support and create a shelving rack; this rear side is not a duplicate climbing face. Hide it to check step ownership, then restore the diagram. Three steps are an icon simplification, not a real model’s total or approved standing positions. Keep the lowest step visually separate from the ground line.

## Give the spreader one endpoint on each side

Mark F and R on the front and rear sides and connect them with one spreader or an explicitly two-part spreader. For the latter, label middle joint M and preserve F–M–R continuity: M is not a third foot on the ground. A near-horizontal open-state spreader is a static relation, not proof of locking. Attach ends to side members rather than free step tips. Use an enlarged audit copy if needed instead of thickening the spreader until it obscures the central opening.

## Preserve hinge and identities in the folded comparison

Duplicate the diagram rightward and move the rear side toward the front around the same H reference. Steps stay on the front side. In a two-part spreader, fold M while keeping its endpoints attached to F and R rather than leaving a long straight bar beyond the sides. Manual placement may maintain illustrative continuity; label approximation when no actual kinematic path was calculated. The images need not share ground height to simulate precision. Check identity and attachment, not a claim that a real ladder follows this folding sequence. F and R identify points on components rather than immovable canvas coordinates. R follows the rear side when it moves; the common top-hinge reference H is the relation preserved in this comparison.

## Retain a deliberately wrong cross-leg step control

In an audit copy, deliberately connect the middle step to the rear member and label the error. Identify the added front-to-rear connection rather than a mere colour change. In a separate control detach the spreader’s rear end: an A-like outline does not prove connected structure. Keep the controls separate so causes remain identifiable. Restore the valid source, checking that label leaders terminate on their intended objects and do not resemble extra spreaders. Hide audit objects for delivery but retain copies.

## Inspect thick edges and hidden lines in output

Save the editable drawing and open a PNG at intended size. Inspect whether thick strokes merge the hinge into a blob, spreader and step into one bar, or background masks break the rear member. Inspect joins enlarged and negative spaces at reduced scale, recording both. Label any hidden-line convention so dashes do not imply another frame. Open PDF or SVG separately rather than inferring text and dash fidelity from an extension. Improved recognisability does not justify a “safe to use” label or weight claim unsupported by a static diagram.

## Reopen and audit hinges and attachment ownership

Leave and reopen the original, identifying H, front steps, rear support and F/R spreader endpoints in both views without exchanged identities. The audit copy should explain why a cross-leg step changes the structure and why shading cannot repair a detached spreader. Export a clean version labelled static diagram, with guides hidden and editable source retained. Acceptance means traceable attachments and explicit side-view omissions, not physical testing, load calculation or guidance for using actual equipment.

## Related tutorials and sources

[VectorPaint articulated desk lamps: connect arms through pivots to the shade](<https://allluckly.cn/en/guides/vectorpaint-articulated-desk-lamp/>), [VectorPaint three-step paired views: map plan treads to side-view heights](<https://allluckly.cn/en/guides/vectorpaint-three-step-two-view/>).

Checked on November 13, 2026: VectorPaint public version 1.0.8, requiring iOS / iPadOS 17.0 or later. Scope follows the [official App Store](<https://apps.apple.com/cn/app/id1587272880>) and [Apple public lookup](<https://itunes.apple.com/lookup?id=1587272880&country=cn&entity=software&timestamp=20261113>). Manual exercises use controls actually available in your installed version; external calculations, written records and diagrams imply no built-in automatic analysis. No step-by-step physical-device, private-file or all-export-environment testing is claimed.