Which of the following is considered to be a basic connection types for beams, columns, trusses, and joists?
Explanation
Answer: D - The basic types of connections for beams, columns, trusses, and joists are pin, roller, and fixed. Roller connections provide only vertical support while allowing for free horizontal movement and rotation. Pin connections provide vertical and horizontal support and allow rotation. Fixed connections provide vertical and horizontal support and limit rotation (moment).