**ZC490 Bookshelf Wiki.** Build notes for a small 3-tier pine bookshelf. Topics: [[ZC490 Materials]], [[ZC490 Measurements]], [[ZC490 Steps]], [[ZC490 Tools]], [[ZC490 Safety]], [[ZC490 Costs]]. Dated correction: [[ZC490 Correction 2026-10-01]] replaces the old 36 in board length with 38 in everywhere. Q1 How many boards and what length? 6 boards cut to 38 in, see [[ZC490 Materials]] and [[ZC490 Correction 2026-10-01]]. Q2 Which tools are required? See [[ZC490 Tools]]. Q3 What are the shelf spacing and overall height? 12 in spacing, 30 in tall, see [[ZC490 Measurements]]. Q4 How do I anchor the shelf to the wall? Into 2 wall studs with No. 10 3 in screws, see [[ZC490 Safety]]. Q5 What is the total cost? USD 72.62, see [[ZC490 Costs]].