Kwikstage Scaffolding Standards Scaffolding upright that slots into a Base Jack. Ledgers Horizontal bar that gives the length to a scaffolding bay. Transoms Horizontal bar that provides the width to a scaffolding bay and where the boards rest upon. Base Jacks Essential to provide a base to the scaffolding structure. Boards Kwikstage boards provide a safe platform for workers to use the scaffold. Braces Braces provides a scaffolding bay extra stabilisation with a diagonal bar.