What type of clips are utilized to fix spurs to ledgers or transoms?

The correct choice is 90-degree clips because they are specifically designed to provide a secure connection at a right angle between spurs and ledgers or transoms. This type of clip ensures stability and alignment, which is crucial in scaffolding structures where the strength and integrity depend on how well components are connected.

90-degree clips fit snugly to hold the vertical spurs in place relative to the horizontal ledgers or transoms. Their shape allows for effective load distribution and helps maintain the overall structural integrity of the scaffolding system. By creating a firm joint at a 90-degree angle, these clips enhance safety during both assembly and use of the scaffolding.

Other types of clips, while they may have their own specific applications in scaffolding, do not provide the same structural support for fixing spurs to ledgers or transoms as 90-degree clips do. For instance, standard clips may not offer the necessary angle or support, adjustable clips are meant for varying heights, and quick-release clips focus on fast assembly rather than strength at a right angle. This specific function of 90-degree clips is what makes them the appropriate choice for this application.