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10.2 Construction Documents: Elevations

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NCIDQ Interior Design Qualification Exam

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1 Introduction & Exam Overview

1.1 About the NCIDQ Exam 1.2 Eligibility & Application Routes 1.3 Test-Taking Strategies & Item Types 1.4 The 2026 NCIDQ Blueprint Overview

2 Study Planning, Codes & Logistics

2.1 Building a Study Plan 2.2 Codes & Reference Standards Overview 2.3 Fees, Schedule & Logistics

3 IDFX: Existing Conditions

3.1 Existing Conditions: Initial Code Analysis 3.2 Existing Conditions: Evaluating the Building

4 IDFX: Pre-Design

4.1 Pre-Design: Site Analysis 4.2 Pre-Design: Best Practices of Design 4.3 Pre-Design: Project Research & Development 4.4 Pre-Design: Determining Design Intent

5 IDFX: Programming

5.1 Programming: Validating the Project Program 5.2 Programming: Programmatic Diagrams 5.3 Programming: Determining User Needs

6 IDFX: Space Planning & Preliminary FF&E

6.1 Space Planning: Completing Space Plans 6.2 Space Planning: Creating Initial Drawings 6.3 Preliminary FF&E: Identifying Finish Materials 6.4 Preliminary FF&E: Identifying Significant FF&E

7 IDFX: Schematics

7.1 Schematics: Refining Design Intent 7.2 Schematics: Performing Code Review 7.3 Schematics: Visualizing Design

8 IDIX: Codes & Life Safety

8.1 Codes & Life Safety: Performing Code Review 8.2 Codes & Life Safety: Life Safety & Occupancy Plan

9 IDIX: Integration & FF&E

9.1 Integration: Integrating Equipment & Building Systems 9.2 Integration: Developing Finish Plan & Specifications 9.3 Integration: Developing Furniture Plans & Specifications

10 IDIX: Construction Documents

10.1 Construction Documents: Details & Sections 10.2 Construction Documents: Elevations 10.3 Construction Documents: Demolition Plans 10.4 Construction Documents: Construction Plans

11 IDIX: RCP & Consultant Coordination

11.1 Construction Documents: Reflected Ceiling Plans 11.2 Consultant Coordination: Coordinating Consultant Drawings & Specs 11.3 Consultant Coordination: Power, Data & Communication Plans 11.4 Consultant Coordination: Signage & Wayfinding

12 IDIX: Construction Specifications & Schedules

12.1 Construction Specifications & Schedules: Developing Construction Specifications 12.2 Construction Specifications & Schedules: Developing Schedules

13 IDPX: Feasibility Studies

13.1 Feasibility Studies: Identifying Project Stakeholders 13.2 Feasibility Studies: Managing the Project Team 13.3 Feasibility Studies: Evaluating Project Feasibility & Due Diligence

14 IDPX: Scheduling, Budgeting & Contracts

14.1 Scheduling & Budgeting: Managing the Project Schedule 14.2 Scheduling & Budgeting: Managing the Project Budget 14.3 Contracts & Procurement: Facilitating the Procurement/Bid Process 14.4 Contracts & Procurement: Managing Proposals & Contracts

15 IDPX: Approvals, Permitting & Construction Process

15.1 Approvals & Permitting: Obtaining Project Approvals 15.2 Approvals & Permitting: Participating in the Permit Process 15.3 Construction Process: Facilitating the Construction Process 15.4 Construction Process: Participating in Change Management

16 IDPX: Site Observation & Project Close-Out

16.1 Project Closeout & Evaluation: Performing Site Visits 16.2 Project Closeout & Evaluation: Conducting Project Close-Out

17 Final Review: Synthesizing the NCIDQ & Exam-Day Readiness

17.1 Synthesizing the Three Sections 17.2 Common Pitfalls & High-Yield Topics 17.3 Exam-Day Readiness & Final-Week Plan

10.2 Construction Documents: Elevations

Key Takeaways Explain This Topic AI

Interior elevations show vertical surfaces and communicate material heights, mounting heights, finishes, and fixture locations — answering the "how high?" and "what finish where?" questions that plans cannot.

Per ICC A117.1-2017, door hardware must be mounted 34" min to 48" max AFF (Section 404.2.7); horizontal grab bars at 33" min to 36" max to the top of the gripping surface (Section 609.4.1); tactile signage at 48" min to 60" max to the baseline (Section 703.3.10).

Critical elevations include feature walls, wet/plumbing walls (requiring precise fixture mounting heights), green/living walls (with irrigation and structural support), and millwork walls with cabinet face details.

Toilet room elevations must show all four walls, fixture mounting heights, grab bar locations and lengths (42" min side wall, 36" min rear wall), clearances, and finish transitions.

Glazing in elevations uses two conventions: reflected glass (diagonal or hatched lines) and transparent glass (light outline with dashed objects behind).

Last updated: August 2026

Why Interior Elevations Matter

Interior elevations show the vertical surfaces of a room — walls, millwork, and fixtures — as they would appear if the viewer stood facing the wall. They are critical for communicating material heights, mounting heights, finishes, and fixture locations to the contractor. While plans show layout, elevations answer the "how high?" and "what finishes where?" questions. On the IDIX exam, elevation content tests the designer's knowledge of accessibility mounting heights, critical wall types, annotation standards, and dimensioning.

What Elevations Show

A complete interior elevation includes:

  • Material boundaries and tags — where tile ends and paint begins, keyed to the finish schedule
  • Vertical dimensions — heights of wainscot, chair rail, backsplash, counter, upper cabinets
  • Mounting heights — fixtures, hardware, signage, grab bars, controls
  • Millwork — cabinet faces, countertop profiles, toe kicks, crown mold
  • Section symbols — cutting-plane indicators showing where a section is taken
  • Keynotes — numbered notes keyed to a legend for specific conditions
  • Critical Elevations

Certain walls demand elevation drawings because of their complexity:

  • Feature walls — accent walls with special finishes, panel patterns, or integrated lighting
  • Wet walls / plumbing walls — walls with plumbing rough-ins requiring precise fixture mounting heights
  • Green walls / living walls — walls with irrigation, drainage, and structural support systems
  • Millwork walls — walls with built-in cabinetry requiring face elevations and internal sections

A wet wall elevation must show the lavatory centerline, faucet rough-in, mirror height, grab bar locations (if accessible), and accessories (soap dispenser, paper towel, shelf) with dimensions to the finish floor. A green wall elevation must show the structural support framing, irrigation lines, drainage trough, and the planting modules with their vertical spacing.

Loading diagram... Interior Elevation: Required Components

Mounting Heights Table

Accessibility standards (ICC A117.1-2017, which aligns with the 2010 ADA Standards) mandate specific mounting heights. The exam tests these numbers directly:

  • Element Mounting Height (above finish floor) Reference
  • Door hardware (operable parts) 34" min to 48" max A117.1 § 404.2.7
  • Grab bars (horizontal, top of gripping surface) 33" min to 36" max A117.1 § 609.4.1
  • Grab bars (vertical, bottom) 39" min to 41" max A117.1 § 604.5.1.2
  • Water closet seat 17" min to 19" max A117.1 § 604.4
  • Lavatory rim (front edge) 34" max A117.1 § 606.2
  • Mirror (bottom edge of reflecting surface) 40" max (above lavatory) A117.1 § 603.3
  • Tactile signage (baseline) 48" min to 60" max A117.1 § 703.3.10
  • Controls / operable parts (general) 34" min to 48" max A117.1 § 308
  • Side grab bar length 42" min A117.1 § 604.5.1.1
  • Rear grab bar length 36" min A117.1 § 604.5.2

These dimensions appear on the toilet room elevations and must be verified against the code during QA/QC. A grab bar at 32" AFF fails because it is below the 33" minimum; a door handle at 50" AFF fails because it exceeds the 48" maximum for operable parts.

Glazing in Elevations

Glazing — windows and glass partitions — appears in elevations using two conventions:

Reflected glass : shown with diagonal or hatched lines indicating the reflective quality; the elevation shows the frame and mullion pattern.

Transparent glass : shown with a light outline only; objects behind the glass may be visible or indicated with dashed lines.

A glazing elevation must also note the glass type (tempered, laminated, insulated), thickness, and any film or interlayer. Safety glazing per IBC Section 2406 is required in doors, adjacent to doors (within 24" of the door plane), and in hazardous locations such as near walking surfaces.

Material Height Locations

Elevations must dimension the heights where finishes change. Industry-standard heights include:

  • Element Typical Height (AFF)
  • Wainscot 36" to 48" (often 42" in commercial)
  • Chair rail 30" to 36" (top of wainscot)
  • Counter backsplash 18" above counter (counter at 36", splash to 54")
  • Upper cabinet bottom 54" (18" above counter)
  • Crown molding At ceiling height, varies

These heights are not always code-mandated but are established by industry practice and ergonomic standards. The elevation notes them explicitly so the contractor does not guess.

Toilet Room Elevations

Toilet room elevations are among the most heavily tested on the IDIX exam because they combine accessibility, plumbing, and finish requirements. A complete toilet room elevation set includes:

Each wall as a separate elevation (4 walls minimum)

Fixture mounting heights — water closet seat (17"-19" AFF), lavatory rim (34" max AFF), mirror (40" max AFF), grab bars (33"-36" AFF)

Clearances — grab bar to toilet paper dispenser distance (min 1-1/2" per A117.1 604.7), centerline of water closet (16"-18" from side wall per A117.1 604.2)

  • Finish transitions — wainscot or tile height, base, ceiling treatment
  • Door — swing direction, hardware height (34"-48" AFF), clearance

The accessible compartment elevation must show the required turning space — 67" diameter in new buildings, 60" in existing buildings per A117.1-2017 Section 304.3.1, or a T-shaped space — plus grab bars on both the rear and side walls and the correct clearance from the water closet centerline to the side wall.

Section Symbols on Elevations

When an elevation references a section detail, it uses a section symbol — a cutting-plane indicator showing the direction of the section cut. The symbol is typically a circle divided by a line, with one half indicating the section number and the other the sheet reference. The arrow on the cutting plane indicates the direction the section is viewed. On elevations, these symbols appear where a vertical section through the wall would reveal additional construction detail.