Building Moving and Demolition (C-21) · Lesson 5 of 6

Protecting the Public and Workers Below: Table 3306.1, Canopies, and Drop Zones

"Protecting the Public and Workers Below: Table 3306.1, Canopies, and Drop Zones" is lesson 5 of 6 in the Building Moving and Demolition (C-21) Learning Hub. It opens with "Pedestrian Protection Goes Up Before the First Cut" and works through 5 short steps, then a worked example you can check yourself against.

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Steps in this lesson

  1. Pedestrian Protection Goes Up Before the First Cut
  2. Reading Table 3306.1
  3. What Each Type of Protection Must Be
  4. Protect the People Working Below the Demolition
  5. Chutes and Drop Zones

The worked example in the course applies this lesson to a realistic job in 6 steps, from "Height class" through "Size the parts".

What you'll be able to do

  • Explain the main idea of "Protecting the Public and Workers Below: Table 3306.1, Canopies, and Drop Zones" in plain language you can use on the exam.
  • Apply this step with confidence: "What Each Type of Protection Must Be".
  • Apply this step with confidence: "Protect the People Working Below the Demolition".
  • Apply this step with confidence: "Chutes and Drop Zones".
  • Test yourself on the worked example and the quick-check quiz inside the classroom.
Pedestrian Protection: CBC Table 3306.1Distance from a 30 ft tall demolition to the lot line30 fttallBARRIER +COVERED WALKWAYBARRIER+ COVEREDWALKWAYBARRIER ONLYNONE5 ft1/4 H = 7.5 ft1/2 H = 15 ft057.51520ftABCDA: 4 ftunder 5 ft:barrier + covered walkwayB: 7 ft5 to 7.5 ft:barrier + covered walkwayC: 12 ft7.5 to 15 ft:barrier onlyD: 16 ftover 15 ft:no protection requiredRows for construction more than 8 ft tall. At 8 ft or less: railings under 5 ft, none at 5 ft or more.Table 3306.1: barrier 8 ft high; walkway 4 ft wide, 150 psf; covered walkway 8 ft clear, 150 psfCBC Sections 3306.2, 3306.5, 3306.7. Entrance canopy: 8 ft out from the face, 150 psf (Title 8 Sec. 1735(j)).Debris drop zone without a chute: barricade 42 in high, 6 ft back from the opening edge (Title 8 Sec. 1736(f)).CC
The diagram for this lesson, exactly as it appears in the Learning Hub.

The first steps of this lesson

Step 1: Pedestrian Protection Goes Up Before the First Cut

California Building Code (CBC) Section 3303.2 says demolishing any building shall not be commenced until pedestrian protection is in place as required by Chapter 33. Section 3306.1 says pedestrians shall be protected during construction, remodeling and demolition as required by the chapter and Table 3306.1, and signs shall direct pedestrian traffic. The type of protection depends on two numbers: the height of the construction and its distance to the lot line.

Step 2: Reading Table 3306.1

For work 8 feet or less in height: construction railings if the lot line is less than 5 feet away, and none at 5 feet or more. For work more than 8 feet in height: a barrier and covered walkway if the lot line is less than 5 feet away, or 5 feet or more but not more than one-fourth the height of construction; a barrier alone where the lot line is 5 feet or more but between one-fourth and one-half the height; and none where it is 5 feet or more and exceeds one-half the height. Compute the one-fourth and one-half heights first, then place the lot-line distance between them.

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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