What is the advised condition when using rivets in the installation of acrylic plastics?

When installing rivets in acrylic plastics, it is crucial to maintain the integrity and structure of the material. The advised condition is to provide adequate spacers. This is important because acrylic is prone to cracking or becoming stressed due to the tightening of the rivets. Spacers help distribute the load and prevent excessive pressure on the acrylic itself, thereby minimizing the risk of damage. They also accommodate for thermal expansion and contraction of the plastic, which can occur due to temperature changes.

By providing spacers, you ensure that the rivets are not installed too tightly against the acrylic, allowing for some flexibility and reducing the likelihood of stress fractures. This method enhances durability and longevity of the installation while maintaining the aesthetic properties of the acrylic material.