Which materials are incorporated by reference and not normally shown on the plans or in the technical specifications?

Bar supports are often incorporated by reference in construction documentation rather than being explicitly detailed in plans or technical specifications. This is because bar supports, which are used to hold reinforcing bars in place during the pouring of concrete, usually follow established industry standards or guidelines that are well-understood by contractors and builders. As such, these details can be referenced through construction codes or existing technical standards, making it unnecessary to illustrate them prominently on the construction drawings.

In contrast, materials like reinforced steel, concrete mix design, and foundation details are typically critical to the structural integrity and performance of a project and are therefore usually included in the plans and specifications. Reinforced steel is a key structural element requiring specific details regarding its placement, sizing, and configuration. Concrete mix design outlines the specific requirements for the type of concrete to be used and serves as a crucial technical specification. Similarly, foundation details provide essential information regarding the construction and design of a structure's foundation, which is critical for its stability and function.