Limited Specialty (D-Series) (C-61) · Lesson 3 of 6

D-34 Toilet Partitions: Accessible Compartment Size, Door and Grab Bar Layout

"D-34 Toilet Partitions: Accessible Compartment Size, Door and Grab Bar Layout" is lesson 3 of 6 in the Limited Specialty (D-Series) (C-61) Learning Hub. It opens with "What D-34 Installs and Which Rule Applies" and works through 5 short steps, then a worked example you can check yourself against.

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Steps in this lesson

  1. What D-34 Installs and Which Rule Applies
  2. Compartment Size and Water Closet Location
  3. Door, Latch and Toe Clearance
  4. Grab Bar Lengths and Positions
  5. Accessories and the Check Order

The worked example in the course applies this lesson to a realistic job in 6 steps, from "Compartment size" through "Bar details".

What you'll be able to do

  • Explain the main idea of "D-34 Toilet Partitions: Accessible Compartment Size, Door and Grab Bar Layout" in plain language you can use on the exam.
  • Apply this step with confidence: "Door, Latch and Toe Clearance".
  • Apply this step with confidence: "Grab Bar Lengths and Positions".
  • Apply this step with confidence: "Accessories and the Check Order".
  • Test yourself on the worked example and the quick-check quiz inside the classroom.
D-34 ACCESSIBLE TOILET COMPARTMENTFloor-mounted water closet, minimum-size wheelchair compartmentPLAN VIEW, FLOOR-MOUNTED WCdoorWC CL 18 in60 in wide59 indoor opening within 4 in of far partitionrear bar36 in minside bar 42 inends 54 in outLAY IT OUT (CBC 11B-604, 11B-609)1) Size: 60 in wide x 59 in deep (56 in deep if wall-hung)2) WC centerline 17-18 in: use 18 in Open side: 60 - 18 = 42 in3) Rear bar: 12 + 24 = 36 in min Spans 6 in to 42 in from side wall4) Side bar 42 in, starts 12 in max 12 + 42 = 54 in from rear wall5) 60 in is 66 in or less: toe clear 9 in high x 6 in deep, one side6) Bars 1-1/4 to 2 in dia, 33-36 in high 1-1/2 in off wall, 250 lb load checkRESULT: 60 x 59 in, rear bar 6 to 42 in, side bar to 54 inSource: 2025 CBC 11B-604.2, 604.5.1-604.5.2, 604.8.1.1-604.8.1.4, 609.2-609.8; CSLB Get Licensed to Build, D-34.CC
The diagram for this lesson, exactly as it appears in the Learning Hub.

The first steps of this lesson

Step 1: What D-34 Installs and Which Rule Applies

CSLB defines D-34 Prefabricated Equipment as installing prefabricated products and equipment, and the list includes all forms and types of toilet and shower room partitions and accessories, store fixtures, laboratory equipment and similar items (CSLB, Get Licensed to Build, D-34). A partition installer sets the walls, door and accessories of the toilet compartment, so the accessible-compartment numbers in the 2025 California Building Code (CBC) Chapter 11B, Section 11B-604 (water closets and toilet compartments) and Section 11B-609 (grab bars), decide where every piece goes. Plumbing fixture counts and pipe sizes belong to the plumber; the compartment geometry is yours.

Step 2: Compartment Size and Water Closet Location

CBC 11B-604.8.1.1: a wheelchair accessible compartment is 60 inches minimum wide, measured perpendicular to the side wall, and 56 inches deep minimum for a wall-hung water closet or 59 inches deep minimum for a floor-mounted one, measured perpendicular to the rear wall. An ambulatory accessible compartment (11B-604.8.2.1) is 60 inches deep minimum and 35 to 37 inches wide. CBC 11B-604.2 puts the water closet centerline 17 inches minimum to 18 inches maximum from the side wall or partition (17 to 19 inches in the ambulatory compartment). Do not use 56 inches deep unless the fixture really is wall-hung.

The remaining 3 steps, the worked example and the quiz are in the course. This is a preview. The full lesson, with the step-by-step explanations, a worked example and a quick-check quiz, is inside the classroom.

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