The document contains technical specifications for various engineered wood joists, including their dimensions, weight, number of plies, and other details. There are specifications provided for 21 different joist designs labeled J1 through J21. The joists range in length from 1063mm to 6362mm, thickness from 72mm to 147mm, and weight from 6.5kg to 60.3kg. Disclaimer text is also included stating that the stability of the overall structure is the responsibility of the building designer.