09.00 Introduction

Overview

Wood construction depends on how parts meet and how the joint responds to force. Compare a few useful joints and mechanical connections, then select methods that fit the structure, appearance, and assembly needs of the display project.

Practice pilot holes, clearance holes, countersinking, and removable fasteners on the actual stock. Make a full-size bracket pattern and confirm that a screwdriver or wrench can still reach the connection after the parts are assembled.

Learning Objectives

• Compare a butt joint, a supported joint, and a removable connection.
• Distinguish a pilot hole from a clearance hole.
• Choose fastener type and length for the material and connection.
• Test a screw or threaded insert without splitting or stripping the stock.
• Plan tool access and disassembly for mixed-material construction.
• Refine the wood structure and bracket pattern for the next module.

Key Terms

• Butt joint: A joint where the end or edge of one part meets another surface.
• Pilot hole: A starter hole sized for a screw’s threaded engagement.
• Clearance hole: A hole that allows a fastener to pass through without threading into that part.
• Countersink: A tapered recess for a matching flat-head screw.
• Threaded insert: A part installed in a material to provide reusable machine threads.
• Dry fit: An assembly check made before glue or final finishing.