Means of Egress Chapter 3 Part 1: Stairs ID 234 Building Codes Fall 2008 Means of Egress Chapter 3 Part 1: Stairs

General requirements for stairs Minimum width 44” (non-residential) Rise and run dimensions Cannot get more narrow Landings based on vertical rise Guard rails when drop >27” Handrails both sides (non-residential) General requirements for stairs

Overall stair dimensions

Stair dimensions

When required? Areas of Refuge

Areas of Refuge

Guard rails

Ramp railing dimensions

Think strategically Try to follow along Take notes SketchUp Tutorial Think strategically Try to follow along Take notes

Components and Groups Use GROUPS for similar repeated items Use COMPONENTS for exact copies of repeated items Components and Groups

Editing Double-click to edit Use quick move and rotate tools Have nothing selected Mouse over object to highlight Click and drag Editing

Painting behavior To paint all elements within a group, paint closed To paint individual elements, open first To paint all instances of a component, OPEN first To paint only on instance, paint closed component Painting behavior

Editing Components Freestanding are easy Surface-breaking Hide/Display the rest of model Surface-breaking Explode first, then recreate Editing Components

Complex uses: Stairs Create tread/riser component 11” minimum tread 7” maximum riser Copy up and over to top of rise Adjust # of copies Adjust length if needed Create group Rotate runs as needed Create landing as needed Complex uses: Stairs