I agree with Dude about "samples" not being appropriate, but "sample parts" works IMO. "sample" as noun adjective - parts can be any size. "...construction of a sample wall"
"Prior to laying of masonry, construct a sample wall panel of each type of exposed masonry work, complete including bond pattern and joint tooling, not less than ..."
"Insist that your builder construct a sample wall where you can see the “real” finished product. Stone_Samples.JPG. Homebuilding Stone ..."
"2.1 List the parts of the wall and ceiling systems. Written tests, practical tests, and projects. 2.2 Select the needed tools for the job. 2.3 Construct a sample wall ..."