Masonry (C-29) · Lesson 8 of 8

Masonry Wall Safety: Limited Access Zone, Bracing and Stacking

"Masonry Wall Safety: Limited Access Zone, Bracing and Stacking" is lesson 8 of 8 in the Masonry (C-29) Learning Hub. It opens with "When a Limited Access Zone Is Required" and works through 6 short steps, then a worked example you can check yourself against.

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Steps in this lesson

  1. When a Limited Access Zone Is Required
  2. How Wide the Zone Is
  3. Who May Enter and How Long It Stays
  4. Bracing Walls Over 8 Feet
  5. Stacking Brick and Block
  6. Dust Control When You Cut Masonry

The worked example in the course applies this lesson to a realistic job in 6 steps, starting with "Apply the obstruction".

What you'll be able to do

  • Explain the main idea of "Masonry Wall Safety: Limited Access Zone, Bracing and Stacking" in plain language you can use on the exam.
  • Apply this step with confidence: "Who May Enter and How Long It Stays".
  • Apply this step with confidence: "Bracing Walls Over 8 Feet".
  • Apply this step with confidence: "Stacking Brick and Block".
  • Apply this step with confidence: "Dust Control When You Cut Masonry".
  • Test yourself on the worked example and the quick-check quiz inside the classroom.
Masonry Wall Safety: Limited Access ZoneSECTION - 14 FT WALL, BOTH SIDESzone 11 ftnot availableproperty line14 ft wallbracescaffold18 ft needed = 14 ft + 4 ftLIMITED ACCESS ZONE (8 CCR 1722)Wall height 14 ft + 4 ft = 18 ft wideon the unscaffolded side, full lengthProperty line 11 ft away: zone = 11 ftOver 8 ft high: braced (1722(b))stays until permanent supports are inBrick stack (8 CCR 1549(a)):7 ft max; taper starts at 4 ft7 - 4 = 3 ft x 2 in per ft = 6 inBlock stack over 6 ft: tapers 1/2 blockback per tier above the 6 ft levelZone 11 ft wide (18 ft wanted, property line limits it); wall bracedBrick stack 7 ft maximum with 6 in total set back above 4 ftOnly workers building the wall may enter; zone stays until the wall is braced (1722(a)(4)-(5))Source: 8 CCR 1722 (Masonry Construction), 1549(a) (Piling Material), 1504 (definition)CC
The diagram for this lesson, exactly as it appears in the Learning Hub.

The first steps of this lesson

Step 1: When a Limited Access Zone Is Required

Cal/OSHA Construction Safety Orders section 1722(a) requires a limited access zone whenever a masonry wall is being constructed. Section 1504 defines it as an area alongside a masonry wall under construction that is clearly demarcated to limit access by employees. The zone is established before the wall is started, and it goes on the side of the wall that will be unscaffolded, since that is the side a falling wall or loose unit would hit.

Step 2: How Wide the Zone Is

Measured perpendicular from the base of the wall on the unscaffolded side, the width equals the height of the wall to be constructed plus 4 feet (1722(a)(3)). The zone runs the entire length of the wall. If a property line or an adjacent structure prevents that width, the zone is the width the obstruction permits. Use the height of the finished wall, not the course you are laying today, because the zone is set up before the wall starts.

The remaining 4 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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