Subchapter 4. Construction Safety Orders
Article 36. Fire Protection and Prevention

New query
§1938. Construction Site, General, Appendix B

Handy Construction Data; Facts; and Information
Plate B-1 Handy Things to Know

1. TO FIND--

(a) the circumference of a circle, multiply the diameter by 3.1416 (approx. 3 1/7).

(b) the diameter of a circle, multiply the circumference by .31831.

(c) the area of a circle, multiply the square of the diameter by .7854.

(d) the area of a triangle, multiply the base by 1/2 the perpendicular height.

(e) the volume of a sphere, multiply cube of the diameter by .5236.

A gallon of water weighs 8 1/2 pounds.

A gallon of water contains 231 cubic inches.

A cubic foot of water contains 7 1/2 gals., 1728 cubic inches and weighs 62 1/2 lbs.

In board measure all boards are assumed to be 1 inch thick. Area of a lineal foot multiplied by length in feet will give the surface contents in square feet.

PLATE B-1-a
SANITATION OF PERSONAL SAFETY DEVICES
(except respiratory protective equipment)

Thorough scrubbing with soap and hot water is ordinarily adequate for cleaning purposes. When additional cleaning appears necessary, one of the following treatments should be used, in addition to the soap and water scrubbing:

(1) Immerse in boiling water for five (5) minutes.

(2) The method recommended by the manufacturer for cleaning and sterilizing.

After following any of these procedures, the equipment should be thoroughly rinsed with water and hung up to dry.

Such items that have been in contact with the skin of the wearer must be replaced if they cannot be cleaned as described.

<General Materials (GM) - References, Annotations, or Tables>

Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.

HISTORY

1. Amendment of Plate B-1-a filed 1-17-80; effective thirtieth day thereafter (Register 80, No. 3).

2. Amendment of Plate B-1-a repealing paragraphs (1)-(2) and renumbering paragraphs filed 7-28-2006; operative 8-27-2006 (Register 2006, No. 30).

PLATE B-2
MEASURES 

 

1 SQUARE MILE ...........= 640 acres 
                         = 6400 square chains 

1 ACRE ..................= 10 square chains  
                         = 4840 square yards 
                         = 43,560 square feet 
                         = a square, each side of
                           which is 208.7 feet 
                         = 16 square rods  

1 SQUARE CHAIN ..........= 484 square yards 
                         = 4356 square feet 
                         = 30.25 square yards  

1 SQUARE ROD.............= 272.25 square feet 
                         = 625 square links 

1 SQUARE YARD ...........= 9 square feet 

1 SQUARE FOOT ...........= 144 square inches 
                         = 0.1337 cu. feet  

1 U.S. GALLON ...........= 231 cu. inches 
                         = 4 quarts 
                         = 8 pints 

1 CUBIC FOOT ............= 7.48 U.S. Gallons

PLATE B-3
WEIGHTS OF MATERIALS 


Approximate Weight  
Material                 Per Cubic Foot--Lbs. 
Aluminum                 166 
Ashes                    43 
Asphalt                  81 
Brass                    524 
Brick (common)           120 (about 3 tons per 1000)  
Brick (fire)             145 
Bronze                   534  
Concrete 150             (4050 lbs. per cu. yd.) 
Copper                   537 
Crushed Rock             95 (2565 lbs. per cu. yd.)  
Dry earth, loose         76 (2052 lbs. per cu. yd.)  
Granite                  179  
Iron, casting            450  
Lead                     708  
Lumber, Fir              32 (2666 lbs. 1000 ft.)  
Lumber, Oak              62 (5166 lbs. 1000 ft.)  
Marble                   168  
Mortar                   100  
Port. Cement             94 (376 lbs. per barrel)  
River Sand               120 (3240 lbs. cu. yd.)  
Steel                    490  
Tar                      63 
Tile                     115 
Water                    62.5  
Zinc 437

PLATE B-4
WEIGHTS OF METALS PER SQUARE FOOT 


Thick-
ness   Wrought  Cast  
Inches Iron     Iron  Steel Copper  Tin   Zinc  Brass  Lead 
              Weights, Pounds per Square Foot 

1/16    2.50    2.34  2.55   2.89   2.41   2.28  2.63   3.7 
1/8     5.00    4.69  5.10   5.79   4.81   4.55  5.26   7.4 
3/16    7.50    7.03  7.65   8.68   7.22   6.83  7.89  11.1 
1/4     10.0    9.38  10.2   11.6   9.63   9.10  10.5  14.8 
5/16   12.50    11.7  12.8   14.5   12.0   11.4  13.2  18.5 
3/8    15.00    14.1  15.3   17.4   14.4   13.7  15.8  22.2 
7/16   17.50    16.4  17.9   20.3   16.8   15.9  18.4  25.9 
1/2 2   0.00    18.7  20.4   23.2   19.3   18.2  21.1  29.7 
9/16   22.50    21.1  23.0   26.0   21.7   20.5  23.7  23.4 
5/8    25.00    23.5  25.5   28.9   24.1   22.8  26.3  37.1 
11/16  27.50    25.8  28.1   31.8   26.5   25.0  28.9  40.8 
3/4    30.00    28.1  30.6   34.7   28.9   27.3  31.6  44.4 
13/16  32.50    30.5  33.2   37.6   31.3    29.6 34.2  48.2 
7/8    35.00    32.8  35.7   40.5   33.7   31.9  36.8  51.9 
15/16  37.50    35.2  38.3   43.4   36.1   34.1  39.5  55.6 
1      40.00    37.5  40.8   46.3   38.5   36.4  42.1  59.3

For rates in square inch, divide by 144.
PLATE B-5
WIND FORCE

FORCE OF WIND IN POUNDS PER SQUARE FOOT 


                  Force                            Force
 Miles          per Square             Miles     per Square  
per Hour       Foot--in Lbs.         per Hour   Foot--in Lbs. 
  1               0.005                 20         1.969 
  2               0.020                 25         3.075 
  3               0.044                 30         4.429 
  4               0.079                 35         6.027 
  5               0.123                 40         7.873 
  6               0.177                 45         9.963 
  7               0.241                 50         12.30 
  8               0.315                 55         14.9 
  9               0.400                 60         17.71 
 10               0.492                 65         20.85 
 12               0.708                 70         24.1 
 14               0.964                 75         27.7 
 15               1.107                 80         31.49 
 16               1.25                 100         49.2 
 18               1.55

PLATE B-6
RULE OF THUMB

(The following are not suggested as a substitute for accurate tables and reference material, but are sometimes useful in making a final safety check.)

Nails
Safe load lateral resistance in pounds equal eight (8) times the pennyweight.

1-6d nail = 8 x 6, or 48 pound
1-6d nail = 8 x 8, or 64 pounds
1-10d nail = 8 x 10, or 80 pounds

Manila Rope
Safe load in tons equals diameter in inches squared. Not accurate in sizes larger than one inch (1").
1" rope = 1 x 1, or 1 ton safe load
1/2" rope = 1/2 x 1/2, or 1/ Ss4 ton safe load
For sisal rope, decrease safe loads by one-third
Plow-steel Cable
Safe load in tons is eight (8) times the diameter in inches squared.
1/2" rope = 1/2 x 1/2 = 1/4 x 8 = 2 tons
Open Eye Hook
Safe load in tons is diameter of eye in inches squared.
2" hook, 2 x 2 = 4 tons

Shackle
Safe load in tons is diameter of pin in one-fourth inches (1/4") squared and divided by three (3).
1/2" diameter = 2 quarters

(2 X 2)/3 = 1 1/3 tons or 2,667 pounds

Chains
Safe load in tons in six (6) times the square of the diameter of chain stock.
1/2" diameter chain stock
1/2 x 1/2 x 6 = 1 1/2 tons or 3,000 pounds

NOTE: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.

HISTORY

1. Amendment filed 3-19-79; effective thirtieth day thereafter (Register 79, No. 12).

PLATE B-7
DOUGLAS FIR "STRUCTURAL PLANKS" ESPECIALLY SUITED FOR SCAFFOLDS

NOTE: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.

HISTORY

1. Repealer filed 3-19-79; effective thirtieth day thereafter (Register 79, No. 12).

PLATE B-8
DOUGLAS FIR "SELECTED LUMBER" FOR ORDINARY
SCAFFOLD PLANK SERVICE

NOTE: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.

HISTORY

1. Repealer filed 3-19-79; effective thirtieth day thereafter (Register 79, No. 12).

PLATE B-9
SQUARE COLUMNS--UNBRACED
ROUGH LUMBER--NOT SURFACED
Length
in Feet

SIZE OF COLUMN CROSS SECTION
4" X 4" 6" X 6" 8" X 8" 10" X 10" 12" X 12" 14" X 14" 16" X 16"
5 15300 36000 64000 100000 144000 196000 256000
6 14600 35400 64000 100000 144000 196000 256000
7 13500 34900 63400 100000 144000 196000 256000
8 11800 34100 62900 100000 144000 196000 256000
9 9600 33000 62300 98900 144000 196000 256000
10 7800 31500 61500 98400 144000 196000 256000
11 6400 29400 60200 97600 142400 196000 256000
12 5400 26700 58700 96700 141700 194200 256000
14
16		 use a
larger size		 20100 54300 93800 139600 192800 258700
15400 47400 89400 136600 190700 251900
18
20		   use a
larger size		 38400 83100 132200 187300 249300
31100 74200 126100 183000 246000

Suggested Maximum Loads in Pounds -- 1,000 Pounds per Square Inch Douglas Fir

HISTORY

1. Change without regulatory effect correcting error in Plate B-9 filed 5-28-91 pursuant to section 100, Title 1, California Code of Regulations (Register 91, No. 27).

PLATE B-10
SUGGESTED LOAD LIMITS
FOR TIMBER BEAMS
STRESS GRADE DOUGLAS FIR -- 500 POUNDS PER SQUARE INCH
(The loads given are for dressed beams which are slightly smaller than nominal sizes listed).

Size in
Inches

BEAM SPAN IN FEET
4 6 8 10 12 14 16 18 20 24
4 X 4 990 880 500 390 330 280        
4 X 6 Hor. 1530 1000 750 600 500 430 370 330    
4 X 6 Vert. 2280 1520 1140 910 760 650 570 510 455 380
6 X 6 3460 2310 1730 1380 1150 990 860 770 690 570
6 X 8 Hor. 4710 3140 2360 1880 1570 1340 1170 1040 940 780
6 X 8 Vert. 6400 4290 3220 2580 2150 1840 1510 1430 1290 1070
8 X 8 8540 5870 4400 3520 2930 2510 2200 1950 1750 1460
8 X 12 Vert. 12820 12820 10330 8270 6890 5910 5170 4590 4180 3440
8 X 14 Vert. 14920 14920 14260 11400 9500 8150 7120 6330 5700 4750
8 X 16 Vert. 17070 17070 17070 15020 12510 10700 9390 8340 7500 6260
10 X 10 13330 11900 8930 7140 5950 5100 4470 3970 3570 2970
10 X12Vert. 16000 16000 13080 10470 8720 7480 6540 5820 5230 4360
10 X14Vert. 18660 18660 18020 14420 12020 10800 9020 8010 7210 6010

PLATE B-11
STRENGTH OF U.S. STANDARD
BOLTS FROM ¼" TO 2" DIAMETER 

BOLT AREAS TENSILE STRENGTH, LBS. SHEARING STRENGTH, LBS.
Diameter of Bolts,
Inches		 Number of Threads per Inch Full Bolt, Sq. In. Bottom of Thread, Sq. In. At 10,000 Lbs. Per Sq. In. At 12,500 Lbs. Per Sq. In. At 17,500 Lbs. Per Sq. In. FULL BOLT BOTTOM OF THREAD
At 7,500 Lbs. Per Sq. In. At 10,000 Lbs. Per Sq. In. At 7,500 Lbs. Per Sq. In. At 10,000 Lbs. Per Sq. In.
¼ 20 0.049 0.027 270 340 470 380 490 200 270
5/16 18 0.077 0.045 450 570 790 580 770 340 450
3/8 16 0.110 0.068 680 850 1,190 830 1,100 510 680
7/16 14 0.150 0.093 930 1,170 1,630 1,130 1,500 700 930
½ 13 0.196 .126 1,260 1,570 2,200 1,470 1.960 940 1,260
9/16 12 0.248 0.162 1,620 2,030 2,840 1,860 2,480 1,220 1,620
5/8 11 0.307 0.202 2,020 2,520 3,530 2,300 3,070 1,510 2,020
¾ 10 0.442 0.302 3,020 3,770 5,290 3,310 4,420 2,270 3,020
7/8 9 0.601 0.419 4,190 5,240 7,340 4,510 6,010 3,150 4,190
1 8 0.785 0.551 5,510 6,890 9,640 5,890 7,850 4,130 5,510
1 1/8 7 0.994 0.693 6,990 8,660 12,130 7,450 9,940 5,200 6,930
1 ¼ 7 1.227 0.890 8,890 11,120 15,50 9,200 12,270 6,670 8,900
1 3/8 6 1.435 1.054 10,540 13,180 18,450 11,140 14,850 7,910 10,540
1 ½ 6 1.767 1.294 12,940 16,170 22,640 13,250 17,60 9,700 12,940
1 5/8 5 ½ 2.074 1.515 15,150 18,940 26,510 15,550 20,740 11,360 15,150
1 ¾ 5 2.405 1.745 17,450 21,800 30,520 18,040 24,050 13,080 17,440
1 7/8 5 2.761 2.049 20,490 25,610 35,860 20,710 27,610 15,370 20,490
2 4 ½ 3.142 2.300 23,000 28,750 40,500 23,560 31,420 17,250 23,000

HISTORY

1. Editorial correction of Diameter of Bolts second entry (Register 95, No. 21).

PLATE B-12
CALIFORNIA HIGHWAY PATROL
STOPPING DISTANCE CHART

NOTE: Authority and reference cited: Section 142.3, Labor Code.

HISTORY

1. Repealer of Plate B-12 filed 4-27-79; effective thirtieth day thereafter (Register 79, No. 17).

PLATE B-13
MAXIMUM ALLOWABLE CONCENTRATIONS FOR
MINERAL DUSTS

HISTORY

1. Repealer of Appendix Plate B-13 filed 10-18-77; effective thirtieth day thereafter (Register 77, No. 43).

PLATE B-13-a
TABLE 1--MINERAL DUSTS

HISTORY

1. Repealer of Appendix Plate B-13-a filed 10-18-77; effective thirtieth day thereafter (Register 77, No. 43).

PLATE B-14
TABLE 1
AMERICAN TABLE OF DISTANCES FOR STORAGE OF EXPLOSIVE MATERIALS

NOTE: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code; and Section 12006, Health and Safety Code.

HISTORY

1. Repealer and new Plate B-14 filed 7-26-85; effective thirtieth day thereafter (Register 85, No. 30).

2. Repealer and new Plate B-14 filed 6-26-97; operative 7-26-97 (Register 97, No. 26). 


	              Table 2 
         Table of Separation Distances of 
 Ammonium Nitrate and Blasting Agents from Explosives 
                  or Blasting Agents 
--------------------------------------------------------------------------  
Donor Weight    Minimum Separation Distance 
               of Acceptor when Barricaded (ft.)    Minimum Thickness of 
Pounds   Pounds     Ammonium                       Artificial Barricades 
Over     Not Over   Nitrate    Blasting Agent               (in.) 
---------------------------------------------------------------------------
          100         3          11                          12 
   100    300         4          14                          12 
   300    600         5          18                          12 
   600  1,000         6          22                          12 
 1,000  1,600         7          25                          12 

 1,600  2,000         8          29                          12 
 2,000  3,000         9          32                          15 
 3,000  4,000        10          36                          15 
 4,000  6,000        11          40                          15 
 6,000  8,000        12          43                          20 

 8,000 10,000        13          47                          20 
10,000 12,000        14          50                          20 
12,000 16,000        15          54                          25 
16,000 20,000        16          58                          25 
20,000 25,000        18          65                          25 

25,000 30,000        19          68                          30 
30,000 35,000        20          72                          30 
35,000 40,000        21          76                          30 
40,000 45,000        22          79                          35 
45,000 50,000        23          83                          35 

50,000 55,000        24          86                          35 
55,000 60,000        25          90                          35 
60,000 70,000        26          94                          40 
70,000 80,000        28         101                          40 
80,000 90,000        30         108                          40 

90,000100,000        32         115                          40 
100,000120,000       34         122                          50 
120,000140,000       37         133                          50 
140,000160,000       40         144                          50 
160,000180,000       44         158                          50 

180,000200,000       48         173                          50 
200,000220,000       52         187                          60 
220,000250,000       56         202                          60 
250,000275,000       60         216                          60 
275,000300,000       64         230                          60

NOTE: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code; and Section 12006, Health and Safety Code.

PLATE B-14a
Types of Storage Facilities
Storage
Type		 Classes of Explosive
Materials, Which May Be
Stored Therein
Type 1
(Permanent)		 Division 1.1
Division 1.2
Division 1.3
Division 1.4
Division 1.5
Type 2
(Portable)		 Division 1.1
Division 1.2
Division 1.3
Division 1.4
Division 1.5
Type 3
("Day Box" for
temporary storage)		 Division 1.1
Division 1.2
Division 1.3
Division 1.4
Division 1.5
Type 4 Division 1.3
Division 1.4
Division 1.5
*Electric Blasting Caps
Type 5 Division 1.5

*As a result of tests with electric blasting caps, it has been determined that these blasting caps are not subject to sympathetic detonation. Therefore, a Type 4 storage facility meets the necessary requirements for storage of blasting caps that do not mass detonate.

NOTE: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.

HISTORY

1. New Plate B-14a filed 6-26-97; operative 7-26-97 (Register 97, No. 26). For prior history, see Register 85, No. 30.

PLATE B-14-b

History

1. Repealer filed 7-26-85; effective thirtieth day thereafter (Register 85, No. 30).

PLATE B-14-c

History

1. Repealer filed 7-26-85; effective thirtieth day thereafter (Register 85, No. 30).

PLATE B-15 


                   Table 1 
      Recommended Distances for Commercial 
           AM Broadcast Transmitters  
              0.535 to 1.605 MHz 
			  
Transmitter Power(1)       Minimum Distance 
     (Watts)                    (Feet) 

Up to 4,000                      800 
5,000                            900 
10,000                         1,300 
25,000                         2,000 
50,0002                        2,900 
100,000                        4,100 
500,000                        9,100 

(1) Power delivered to antenna.
(2) 50,000 watts is the present maximum power of U.S. broadcast transmitters in this frequency range. 


                  Table 2 
 Recommended Distances for Transmitters up to  
  50 MHz (Excluding AM Broadcast) Calculated 
 for a Specific Loop Pickup Configuration(1)(2) 

      Transmitter Power(3)      Minimum Distance 
             (Watts)                 (Feet) 
               100                      800 
                500                   1,700 
              1,000                   2,500 
              5,000                   5,500 
             50,000                  17,000 
            500,000(4)               55,000 
			
(1) Based on the configuration shown in Fig. 2b, using 20.8 MHz, which is the most sensitive frequency. 
(2) This table should be applied to International Broadcast Transmitters in the 10-25 MHz range. 
(3) Power delivered to antenna. 
(4) Present maximum for International Broadcast. 




                                                         Table 3
                                         Recommneded Distances of Mobile Transmitters
                                             Including Amateur and Citizens Band
												 
												 
                                                               VHF                        VHF                           UHF                                   
Transmitter              MF              HF          35 to 36 MHz Public Use     144 to 148 MHz Amateur      450 to 470 MHz Public Use           
Power(1)           1.6 to 3.4 MHz   28 to 29.7MHz     42 to 44 MHz Public Use     150.8 to 161.6 MHz              Cellular Automobile       
(Watts)            Industrial        Amateur         50 to 54 MHz Amateur           Public Use              Telephones Above 800 MHz
          5               30               70                       60                      20                           10       
	 10               40              100                       80                      30                           20         
	 50               90              230                      180                      70                           40        
	180              120              320                      260                     100                           60                   
        180(2)            170              430                      350                     130                           80                
	250              200              500                      410                     160                           90                                     
	500(3)            280              710                      580                     220                          120                                                                                                                     
        600(4)            300              780                      640                     240                          140              
      1,000(5)            400            1,010                      820                     310                          180      
     10,000(6)          1,240            3,200                    2,600                     990                          560                   

             Citizens Band, Class D Transmitters, 26.96-27.41 MHz              
                                         Recommended Minimum Distance          
            Type                      Hand-Held             Vehicle-Mounted    
   Double sideband-4 watts                                                     
           maximum                                                             
      transmitter power                 5 ft.                   65 ft.         
Single Sideband-12 watts peak                                                  
    envelope power 20 ft.              110 ft.                                 


(1) Power delivered to antenna.
(2) Maximum power for two-way mobile units in VHF (150.8 or 161.6 MHz
    range) and for two-way mobile and fixed station units UHF (450 to 460 MHx range).
(3) Maximum power for major VHF two-way moblie and fixed station units in 35 to 44 MHz range.
(4) Maximum power for two-way fixed station units in VHF (150.8 to 161.6 MHz range).
(5) Maximum power for amateur radio moblie units.
(6) Maximum power for some base stations in 42 to 44 MHz band and 1.6 to 1.8 MHz band.                                                                


                         Table 4 
             Recommended Distances for VHF TV  
             and FM Broadcasting Transmitters 

Effective Radiated Power                 Minimum Distance (Feet) 
      (Watts)     Channels 2 to 6    FM Radio     Channels 7 to 13 

  Up to  1,000          1,000         800                600 
        10,000          1,800       1,400              1,000 
       100,000(1)        3,200       2,600              1,900 
       316,000(2)        4,300       3,400              2,500 
     1,000,000          5,800       4,600              3,300 
    10,000,000         10,200       8,100              5,900 

 (1) Present maximum power channels 2 to 6 and FM--100,000 watts. 
 (2) Present maximum power channels 7 to 13--316,000 watts. 


                     Table 5 
  Recommended Distances from UHF TV Transmitters 
 
Effective Radiated Power       Minimum Distance 
        (Watts)                     (Feet) 
       Up to 10,000                     600 
          1,000,000                   2,000
          5,000,000(1)                 3,000 
        100,000,000                   6,000 
		
(1) Present maximum power channels 14 to 83--5,000,000 watts.

NOTE: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.

HISTORY

1. Repealer of Plates B-15-a and B-15-b and new Plate B-15 filed 7-8-81; effective thirtieth day thereafter (Register 81, No. 28).

2. Amendment of NOTE filed 7-26-85; effective thirtieth day thereafter (Register 85, No. 30).

3. Repealer and new Plate B-15 filed 6-26-97; operative 7-26-97 (Register 97, No. 26).

PLATE B-16
LADDERS

Safe Procedure In Setting Up a Ladder

The base should be one-fourth the ladder length from the vertical plane of the top support

HISTORY

1. Amendment filed 5-21-75; effective thirtieth day thereafter (Register 75, No. 21).

2. Change without regulatory effect providing more legible illustrations filed 8-4-2008 pursuant to section 100, title 1, California Code of Regulations (Register 2008, No. 32).

PLATE B-17
CRITERIA FOR STAIRS, LADDERS AND RAMPS OR INCLINES

Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.

1. Amendment filed 5-21-75; effective thirtieth day thereafter (Register 75, No. 21).

2. Amendment filed 12-4-2007; operative 1-3-2008 (Register 2007, No. 49).

3. Change without regulatory effect providing more legible illustrations filed 8-4-2008 pursuant to section 100, title 1, California Code of Regulations (Register 2008, No. 32).

PLATE B-18
LIGHT-TRADE POLE SCAFFOLD
For Scaffolds Over 20 Feet High Use 3" x 4" Uprights

For carpenters, lathers, shinglers, painters, plasterers, sheet metal workers and other trades not using heavy tools or storing heavy materials on the scaffold.

NOTE: (1) Continuous sills may be required on pavement or other surfaces that might cause slipping. When uprights are placed on the ground, they must rest on sills or foot blocks that are adequate to sustain the load.

(2) Ladders do not have to be placed as shown, but may be located at any suitable place on the scaffold that gives proper access to the platform or platforms.

NOTE: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.

HISTORY

1. Repealer and new Plate B-18 filed 3-19-79; effective thirtieth day thereafter (Register 79, No. 12).

2. Amendment filed 7-24-87; operative 8-23-87 (Register 87, No. 33).

3. Change without regulatory effect providing more legible illustrations filed 8-4-2008 pursuant

PLATE B-19
HEAVY-TRADE POLE SCAFFOLD
For Scaffolds Over 20 Feet High Use 4" x 6" Uprights

For bricklayers, stone masons, stone cutters, concrete workers and other trades using heavy tools or storing heavy materials on the scaffold.

NOTE: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.

HISTORY

1. Repealer and new Plate B-19 filed 3-19-79; effective thirtieth day thereafter (Register 79, No. 12).

2. Amendment filed 7-24-87; operative 8-23-87 (Register 87, No. 33).

3. Change without regulatory effect providing more legible illustrations filed 8-4-2008 pursuant to section 100, title 1, California Code of Regulations (Register 2008, No. 32).

PLATE B-20
WOODEN BRACKET SCAFFOLD (Suggested)
(Can be Prefabricated for Attachment to Wall
Forms at Various Positions, Or Can be Made As a
Permanent Part of Movable Form Panel)

NOTE: (1) Maximum load is 25 psf.
(2) For railing and toeboard requirements, see Article 16 and Section 1645.

NOTE: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.

HISTORY

1. Amendment filed 7-24-87; operative 8-23-87 (Register 87, No. 33).

2. Change without regulatory effect providing more legible illustrations filed 8-4-2008 pursuant to section 100, title 1, California Code of Regulations (Register 2008, No. 32).

PLATE B-21
METAL BRACKET SCAFFOLD (Suggested)
("WALER JACK")

NOTE: Bracket should not be used on walers held by wire ties unless there are at least three such ties fairly close to each jack. Bolted walers are preferred where brackets are used.

NOTE: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.

HISTORY

1. Amendment filed 7-24-87; operative 8-23-87 (Register 87, No. 33).

2. Change without regulatory effect providing more legible illustrations filed 8-4-2008 pursuant to section 100, title 1, California Code of Regulations (Register 2008, No. 32).

PLATE B-22
LIMIT SPANS TO 7'6" (Suggested)
(FOR MULTIPLE SCAFFOLD USE AT LEAST
3" x 16" OUTRIGGERS)

NOTE: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.

HISTORY

1. Amendment filed 7-24-87; operative 8-23-87 (Register 87, No. 33).

2. Change without regulatory effect providing more legible illustrations filed 8-4-2008 pursuant to section 100, title 1, California Code of Regulations (Register 2008, No. 32).

PLATE B-23
BOATSWAIN'S CHAIR (Suggested)

NOTE: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.

HISTORY

1. Amendment of Plates B-18, B-19, B-20, B-21, B-22 and B-23 filed 11-14-75; effective thirtieth day thereafter (Register 75, No. 46).

2. Relocation and amendment of former Plate B-23 to Section 1662 (j) filed 7-24-87; operative 8-23-87 (Register 87, No. 33).

PLATE B-24
OUTRIGGER BEAM FOR SUSPENDED STAGING (Suggested)

Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.

1. Renembering and ammendment of former Plate B-24 to Plater B-26 and renumbering and amendment of Plate B-23-a to Plate B-24 filed 7-24-87; operative 8-23-87 (Register 87, No. 33).

2. Change without regulatory effect providing more legible illustrations filed 8-4-2008 pursuant to section 100, title 1, California Code of Regulations (Register 2008, No. 32).

PLATE B-24
ACCEPTABLE SCAFFOLDS (Suggested)

HISTORY

1. Renumbering and amendment of former Plate B-24 to Plate B-26 filed 7-24-87; operative 8-23-87 (Register 87, No. 33).

PLATE B-24-a
SUSPENDED LADDER SCAFFOLD (Suggested)

HISTORY

1. Renumbering and amendment of Plate B-24-a to Plate B-26-a filed 7-24-87; operative 8-23-87 (Register 87, No. 33).

PLATE B-25
SWING STAGE SHOWING CENTER SUPPORT

HISTORY

1. Renumbering and amendment of Plate B-25 to Plate B-28 filed 7-24-87; operative 8-23-87 (Register 87, No. 33).

PLATE B-25-a
SAFE HITCHES AND KNOTS

HISTORY

1. Renembering of Appendix Plate C-7 to B-25-a filed 2-19-75; effective thirtieht day thereafter (Register 75, No. 8).

2. Change without regulatory effect providing more legible illustrations filed 8-4-2008 pursuant to section 100, title 1, California Code of Regulations (Register 2008, No. 32).

PLATE B-25-b
PAINTER'S HITCH

STEPS IN MAKING A SAFE HITCH

1. Locate and prepare a place where load is to go.

2. Determine the weight of the load.

3. Determine the places where the hitching equipment is to be put on.

4. Decide on the type of hitch and hitching equipment which is necessary.

5. Decide on size of hitching equipment.

6. Put on hitch after checking condition of hitching equipment.

7. Take out hte slack and check the hitch.

8. Raise the load to a safe level and travel to the destination.

9. Lower the load near the landing area.

10. Adjust the blocking.

11. Set the load down onthe blocking.

12. Remove the hitching equipment.

13. Check the hitching equipment.

14. Return equipment to proper place.

History

1. Renembering of Appendix Plate C-8 to B-25-B filed 2-19-75; effective thirtieht day thereafter (Register 75, No. 8).

2. Change without regulatory effect amending step 1 in Plate B-25-b filed 5-28- 91 pursuant to section 110, title 1, California Code of Regulations (Register 91, No. 27).

3. Change without regulatory effect providing more legible illustrations filed 8-4-2008 pursuant to section 100, title 1, California Code of Regulations (Register 2008, No. 32).

PLATE B-26
ACCEPTABLE SCAFFOLDS
(Suggested*)
SUSPENDED SCAFFOLD

*See section 1658 for required railing protection

NOTE: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.

HISTORY

1. Amendment of Plate B-26 filed 11-14-75; effective thirtieht day thereafter (Register 75, No. 46).

2. Renembering and ammendment of Plate B-26 to Plater B-29, and renumbering and amendment of former Plate B-24 to Plate B-26 filed 7-24-87; operative 8-23-87 (Register 87, No. 33).

3. Change without regulatory effect providing more legible illustrations filed 8-4-2008 pursuant to section 100, title 1, California Code of Regulations (Register 2008, No. 32).

PLATE B-26-a
SUSPENDED LADDER SCAFFOLD
(Suggested)*

*See Section 1658 for required railing protection.

NOTE: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.

HISTORY

1. Renembering and ammendment of Plate B-24-a to Plater B-26-a filed 7-24-87; operative 8-23-87 (Register 87, No. 33).

2. Change without regulatory effect providing more legible illustrations filed 8-4-2008 pursuant to section 100, title 1, California Code of Regulations (Register 2008, No. 32).

PLATE B-27
MASON'S OUTRIGGER SCAFFOLDS (Suggested)

PLATE B-27-a
WELDERS' PLATFORM CAGES (Suggested)

HISTORY

1. Renembering and ammendment of Plate B-28 to Plater B-27-a, filed 7-24-87; operative 8-23-87 (Register 87, No. 33).

2. Change without regulatory effect providing more legible illustrations filed 8-4-2008 pursuant to section 100, title 1, California Code of Regulations (Register 2008, No. 32).

PLATE B-28
SWING STAGE SHOWING CENTER SUPPORT ACCEPTABLE
FOR RAILING REINFORCEMENT*

*See Section 1658 for required railing protection.

NOTE: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.

HISTORY

1. Renembering and ammendment of former Plate B-28 to Plater B-27-a and renumbering and amendment of Plate B-25 to Plate B-28 filed 7-24-87; operative 8-23-87 (Register 87, No. 33).

2. Change without regulatory effect providing more legible illustrations filed 8-4-2008 pursuant to section 100, title 1, California Code of Regulations (Register 2008, No. 32).

PLATE B-29

ACCEPTABLE MASONS' SUSPENDED SCAFFOLD
That Will Comply with Order No. 1659
Limit Plank Spans to 8'-0"

NOTE: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.

HISTORY

1. Renembering and ammendment of former Plate B-29 to Plate B-31, and renumbering and amendment of Plate B-26 to Plate B-29 filed 7-24-87; operative 8-23-87 (Register 87, No. 33).

2. Change without regulatory effect providing more legible illustrations filed 8-4-2008 pursuant to section 100, title 1, California Code of Regulations (Register 2008, No. 32).

PLATES B-29, B-29-a and B-29-b

HISTORY

1. Renumbering of former Plates B-29, B-29-a and B-29-b to Plates B-31, B-31-a and B-31-b filed 7-24-87; operative 8-23-87 (Register 87, No. 33).

PLATE B-30
Nails and Spikes.

(1) Safe Lateral Strength. A common wire nail driven perpendicular to grain of the wood, when used to fasten wood members together, shall not be subjected to a greater load causing shear and bending than the safe lateral strength of the wire nail or spike as set forth in Plate B-30-a.

A wire nail driven parallel to the grain of the wood or toe nailed shall not be subjected to more than two-thirds of the lateral load allowed when driven perpendicular to grain.

PLATE B-30-a
SAFE LATERAL STRENGTH AND REQUIRED PENETRATION OF COMMON WIRE NAILS
Driven Perpendicular to Grain of the Wood
 

 

 

Size of nail

 Standard length (inches)  

 

Wire gauge

 Penetration required (inches) Loads (pounds)    
Douglas fir or southern pine Redwood Other species
6d………… 2 11 ½ 1 70 58 As determined by the enforcing agency
8d………… 2 ½ 10 ¼ 1 ¼ 100 82
10d……….. 3 9 1 ½ 120 98
12d……….. 3 ¼ 9 1 5/8 130 106
16d……….. 3 ½ 8 1 5/8 160 123
20d……….. 4 6 2 190 155
30d……….. 4 ½ 5 2 1/4 230 188
40d……….. 5 4 2 1/3 270 220
50d……….. 5 ½ 3 2 3/4 310 250
60d……….. 6 2 3 360 295

(2) Safe Resistance to Withdrawal. A wire nail driven perpendicular to grain of the wood shall not be subjected to a greater load, tending to cause withdrawal, than the safe resistance of the nail to withdrawal, as set forth in Plate B-30-b.

Nails driven parallel to grain of the wood shall not be allowed for resisting withdrawal forces.

PLATE B-30-b
SAFE RESISTANCE TO WITHDRAWAL OF COMMON WIRE NAILS

Inserted Perpendicular to Grain of the Wood, in Pounds per Linear Inch of Penetration into the Main Member
Kind of wood Size of nail
Douglas Fir or Southern Pine or Redwood………… 6d 8d 10d 12d 16d 20d 30d 40d 50d 60d
27 29 35 35 39 48 52 56 61 67
Other species……………………………………….. As determined by the enforcing agency

(3) Spacing and Penetration. Common wire nails shall have penetration into the piece receiving the point as set forth in Plate B-30-a. Nails or spikes, for which the wire gauges or lengths are not specified in Plate B-30-a, shall have a required penetration of not less than nine and one-half diameters, and allowable loads may be interpolated.

For wood to wood joints the spacing center-to-center shall be not less than the required penetration.

Edge and end distances shall be not less than one-half of the required penetration.

Holes for nails, where necessary to prevent splitting, shall be bored of a diameter smaller than that of the nails.

PLATE B-31 BOLTS

Safe loads in pounds for bolts in double shear and in seasoned lumber of the following species: cypress, southern; Douglas fir (coast and inland region); larch, wester; pine, southern yellow; in joints consisting of three members in which the side members are one-half the thickness of the main member, shall not exceed values set forth in Plates B-31-a, -b.

PLATE B-31-a
HOLDING POWER OF BOLTS
Loads Parallel to Grain (p)
Length of bolt in main member1

(inches)

 Diameter of bolt (inches)
½ 5/8 ¾ 7/8 1 1 5/8 1 ¼
1 5/8…….

910

1,160

1,390

1,630

1,860

    
2 5/8…….

1,150

1,700

2,190

2,610

3,010

    
3 2/8…….

1,160

1,810

2,570

3,310

3,990

    
4 ½……

1,160

1,810

1,600

2,530

4,480

5,380

  
5 ½……...

-

1,810

2,620

3,550

4,610

5,800

  
6 ½……...

-

1,810

2,600

2,550

4,630

5,850

  
7 ½……...

-

1,810

2,600

3,550

4,630

5,850

  
9 ½……...

-

-

2,600

3,550

4,630

5,350

7,240
11 ½…….

-

-

-

-

4,630

5,850

7,240

1 This assumes dressed size lumber. Safe loads for other lengthsof bolt in main member may be obtained be interpolation.

PLATE B-31-b
HOLDING POWER OF BOLTS
Loads Perpendicular to Grain (q)
Length of bolt in main member1

(inches)

 Diameter of bolt (inches)

½

5/8

¾

7/8

1

1 1/3

1 1/4
1 5/8

430

490

540

600

660

    
2 5/8

700

790

880

970

1,050

    
3 5/8

920

1,090

1,210

1,340

1,460

    
4 ½

920

1,300

1,510

1,660

1,810

1,970

  
5 ½

-

1,800

1,750

2,020

2,210

2,410

  
6 ½

-

1,250

1,750

2,260

2,590

2,860

  
7 ½

-

1,170

1,890

2,250

2,820

3,250

  
9 ½

-

-

1,520

2,120

2,760

3,450

4,130
11 ½

-

-

-

-

2,570

3,200

4,040

1 This assumes dressed size lumber. Safe loads for other lengths of bolt in main member may be obtained be interpolation.

HISTORY

1. Renumbering and amendment of Plates B-29, B-29-a and B-29-b to Plates B-31, B-31-a and B-31-b filed 7-24-87; operative 8-23-87 (Register 87, No. 33).

PLATE B-32
(EXAMPLE)
BRICKLAYERS' SQUARE SCAFFOLD

NOTE: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3. Labor Code.

HISTORY

1. New Plate B-32 filed 7-24-87; operative 8-23-87 (Register 87, No. 33).

2. Change without regulatory effect providing more legible illustrations filed 8-4-2008 pursuant to section 100, title 1, California Code of Regulations (Register 2008, No. 32).

PLATE B-33
PUMP JACK SCAFFOLD
(EXAMPLE)

NOTE: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3. Labor Code.

HISTORY

1. New Plate B-33 filed 7-24-87; operative 8-23-87 (Register 87, No. 33).

2. Change without regulatory effect providing more legible illustrations filed 8-4-2008 pursuant to section 100, title 1, California Code of Regulations (Register 2008, No. 32).

PLATE B-34
(EXAMPLE)
LADDER JACK SCAFFOLD

NOTE: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3. Labor Code.

HISTORY

1. New Plate B-34 filed 7-24-87; operative 8-23-87 (Register 87, No. 33).

2. Change without regulatory effect providing more legible illustrations filed 8-4-2008 pursuant to section 100, title 1, California Code of Regulations (Register 2008, No. 32).

PLATE B-35
(EXAMPLE)
WINDOW JACK SCAFFOLD

NOTE: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3. Labor Code.

HISTORY

1. New Plate B-35 filed 7-24-87; operative 8-23-87 (Register 87, No. 33).

2. Change without regulatory effect providing more legible illustrations filed 8-4-2008 pursuant to section 100, title 1, California Code of Regulations (Register 2008, No. 32).

PLATE B-36
(EXAMPLE) STONE SETTERS' ADJUSTABLE MULTI-POINT SUSPENDED SCAFFOLD WITH MANUAL WINDING DRUM HOISTS

NOTE: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.

HISTORY

1. New Plate B-36 filed 7-24-87; operative 8-23-87 (Register 87, No. 33).

2. Change without regulatory effect providing more legible illustrations filed 8-4-2008 pursuant to section 100, title 1, California Code of Regulations (Register 2008, No. 32).

PLATE B-37
NEEDLE BEAM SCAFFOLD
(EXAMPLE)
STRUCTURAL MEMBER ABOVE

NOTE: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.

HISTORY

1. New Plate B-37 filed 7-24-87; operative 8-23-87 (Register 87, No. 33).

2. Change without regulatory effect providing more legible illustrations filed 8-4-2008 pursuant to section 100, title 1, California Code of Regulations (Register 2008, No. 32).

PLATE B-38
FLOAT SCAFFOLD
(EXAMPLE)

NOTE: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.

HISTORY

1. New Plate B-38 filed 7-24-87; operative 8-23-87 (Register 87, No. 33).

2. Change without regulatory effect providing more legible illustrations filed 8-4-2008 pursuant to section 100, title 1, California Code of Regulations (Register 2008, No. 32).

PLATE B-39
TWO-POINT SUSPENDED SCAFFOLD
(Example)

NOTE: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.

HISTORY

1. New Plate B-39 filed 7-24-87; operative 8-23-87 (Register 87, No. 33).

PLATE B-40
PROHIBITED SCAFFOLDS
(Examples)

NOTE: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.

HISTORY

1. Renumbering and amendment of former Plate C-20 to Plate B-40 filed 7-24-87; operative 8-23-87 (Register 87, No. 33).

2. Change without regulatory effect providing more legible illustrations filed 8-4-2008 pursuant to section 100, title 1, California Code of Regulations (Register 2008, No. 32).

PLATE B-41
SUGGESTED SCAFFOLD HORSES
(See Construction Safety Order 1647)

NOTE: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.

HISTORY

1. Renumbering and amendment of former Plate C-21 to Plate B-41 filed 7-24-87; operative 8-23-87 (Register 87, No. 33).

2. Change without regulatory effect providing more legible illustrations filed 8-4-2008 pursuant to section 100, title 1, California Code of Regulations (Register 2008, No. 32).

PLATE B-42
MULTI-LEVEL SUSPENDED SCAFFOLD WITH POWERED HOISTS

NOTE: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.

HISTORY

1. New Plate B42 filed 7-24-87; operative 8-23-87 (Register 87, No. 33).

2. Change without regulatory effect providing more legible illustrations filed 8-4-2008 pursuant to section 100, title 1, California Code of Regulations (Register 2008, No. 32).

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