There is only one Vectorworks tool for creating guardrails, handrails, and fences; the Railing/Fence tool. This tool is designed to create rails and fences. This means that it has several settings and choosing the correct settings will create a handrail or a fence.
Settings and Drawing a Rail
This is a Settings dialog box for controlling all the settings. It is important to set these correctly to get the rail/fence you require.