What are the different parts of a staircase called? Here are some staircase anatomy diagrams to show you some of most important aspects of your staircase. What design options do I have to choose from for my timber handrail? Selection Sheets Download Selection Sheet 1 (Handrails ) Download Selection Sheet 2 (Timber Balusters) Download Selection Sheet 3 (Timber Posts 90×90 ) Download Selection Sheet 4 (Boxed Posts 115×115 ) Download Selection Sheet 5 (Satin Black Balusters 16mm ) Call us today on (08) 9302 4315 or (0417982043) to start planning your unique timber staircase.