This information is provided free of charge by the Department of Industrial Relations from its web site at www.dir.ca.gov. These regulations are for the convenience of the user and no representation or warranty is made that the information is current or accurate. See full disclaimer at https://www.dir.ca.gov/od_pub/disclaimer.html.

Subchapter 4. Construction Safety Orders

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

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.

(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.

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

Thickness	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

TABULAR OR GRAPHIC MATERIAL SET FORTH AT THIS POINT IS NOT DISPLAYABLE

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

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

	SIZE OF COLUMN CROSS SECTION
Lenght in Feet	4‘x4‘	6‘x6‘	8‘x8‘	10‘x10‘	12‘x12‘	14‘x14‘	16‘x16‘
5	15,300	36,000	64,000	100,000	144,000	196,000	256.000
6	14,300	35,400	64,000	100,000	144,000	196,000	256,000
7	13,500	34,900	63,400	100,000	144,000	196,000	256,000
8	11,800	34,100	62,900	100,000	144,000	196,000	256,000
9	9,600	33,000	62,300	98,900	144,000	196,000	256,000
10	7,800	31,500	61,500	98,400	144,000	196,000	256,000
11	6,400	29,400	60,200	97,600	142,000	196,000	256,000
12	5,400	26,700	58,700	96,700	141,700	194,200	256,000
14	use a	20,100	54,300	93,800	139,600	192,800	258,700
16	larger size	15,400	47,400	89,400	136,600	190,700	251,900
18		use a	38,400	83,100	132,200	187,300	249,300
20		larger size	31,100	74,200	126,100	183,000	246,000

TABULAR OR GRAPHIC MATERIAL SET FORTH AT THIS POINT IS NOT DISPLAYABLE

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).

PLATE B-11 STRENGTH OF U.S. STANDARD BOLTS FROM 1/4‘ TO 2‘ DIAMETER

History

1. Editorial corrections 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 EXPLOSIVES 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 of New Plate B-14 filed 7-26-85; effective thirtieth day thereafter (Register 85, No. 30).

2. Repealer of 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 Balsting 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
90,000	100,000	32	115	40
100,000	120,000	34	122	50
120,000	140,000	37	133	50
140,000	160,000	40	144	50
160,000	180,000	44	158	50
180,000	200,000	48	173	50
200,000	220,000	52	187	60
220,000	250,000	56	202	60
250,000	275,000	60	216	60
275,000	300,000	64	230	60

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

PLATE B-14a Types of Storage Facilities

	Classes of Explosive
Storage	Materials, Which May Be
Type	Stored Therein
	Division 1.1
Type 1	Division 1.2
(Permanent)	Divison 1.3
	Division 1.4
	Division 1.5
Type 2	Division 1.1
(Portable)	Divison 1.2
	Division 1.3
	Division 1.4
	Division 1.5
	Division 1.1
Type 3	Division 1.2
(“Day Box” for)	Divison 1.3
temporary storage)	Division 1.4
	Division 1.5
	Division 1.3
Type 4	Division 1.4
	Divison 1.5
	[FNa1]Electric Blasting Caps
Type 5	Divison 1.5

[FNa1] 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 [FN1]	Minimum Distance
(Watts)	(Feet)
Up tp 4,000	800
5,000	900
10,000	1,300
25,000	2,000
50,000 [FN2]	2,900
100,000	4,100
500,000	9,100

[FN1] Power delivered to antenna.

[FN2] 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 [FN1] [FN2]
Transmitter Power [FN3]	Minimum Distance
(Watts)	(Feet)
100	800
500	1,700
1,000	2,500
5,000	5,500
50,000	17,000
500,000 [FN4]	55,000

[FN1] Based on the configuration shown in Fig. 2b, using 20.8 MHz, which is the most sensitive frequency.

[FN2] This talbe should be applied to International Broadcast Transmitters in this 10-25 MHz range.

[FN3] Power delivered to antenna.

[FN4] Present maximum for International Broadcast.

Table 3

Recommended Distances of Mobile Transmitters

Including Amateir and Citizens Band

MINIMUM DISTANCE (Feet)

			VHF	VHF	UHF
			35 to 36 MHz Public Use	144 to 148 MHz Amateur	450 to 470 MHz Public Use
Transmitter [FN1]	MF	HF	42 to 44 MHz Public Use	150.8 to 161.6 MHz	Cellular Automobile
Power	1.6 to 3.4 MHz	28 to 29.7 MHz	50 to 54 MHz Amateur	Public Use	Telephone Above 800 MHz
(Watts)	Industrial	Amateur
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 [FN2]	170	430	350	130	80
250	200	500	410	160	90
500 [FN3]	280	710	280	220	120
600 [FN4]	300	780	640	240	140
1,000 [FN5]	400	1,010	820	310	180
10,000 [FN6]	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.

[FN1] Power delivered to antenna.

[FN2] 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).

[FN3] Maximum power for major VHF two-way moblie and fixed station units in 35 to 44 MHz range.

[FN4] Maximum power for two-way fixed station units in VHF (150.8 t o 161.6 MHz range).

[FN5] Maximum power for amateur radio moblie units.

[FN6] 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 [FN1]	3,200	2,600	1,900
316,000 [FN2]	4,300	3,400	2,500
1,000,000	5,800	4,600	3,300
10,000,000	10,200	8,100	5,900

[FN1] Present maximum power channels 2 to 6 and FM-100,000 watts.

[FN2] Present maximum power channels 7 to 13-316,000 watts.

Table 5

Recommended Distances from UHF TV Transitters
Effective Radiated Power	Minimum Distance
(Watts)	(Feet)
Up to 10,000	600
1,000,000	2,000
5,000,000 [FN1]	3,000
100,000,000	6,000

[FN1] 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 filed 7-8-81; effective thirtieth day thereafter (Register 81, No. 30).

2. Amendment of NOTE filed 7-26-85; effictive 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

“Don't be the Fall Guy” (for stairs installed on or after April 3, 1997)

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) Continous 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 75, No. 21).

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-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 BRACKETS SCAFFOLD (Suggested)

(Can be Prefabricated for Attachment to Wall Forms at Various Postions, Or Can be Made As a Permanent Part of Movable Form Panel)

NOTE: (1) Maximum load is 25 psf.

(2) For railing and toeload requirments, 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 shold not be usded on walers held by wire 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.

History

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. 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).

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

History

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

PLATE B-25 SWING STAGE SHOWING CENTER SUPPORT

History

1. Renembering and ammendment of Plate B-24 to Plater B-26 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 [FNa1])

SUSPENDED SCAFFOLD

[FNa1]

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 SCAFFOLDS (Suggested) [FNa1]

[FNa1]

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' PLAFTFORM 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 RAILNG REINFORCEMENT [FNa1]

[FNa1]

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).

PLATE B-29, B-29-a and B-29-b

History

1. Renembering of former Plates B-29 to Plate 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 loade allowed when diven perpendicular to grain.

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

				Loads (pounds)
	Standard		Penetration	Douglas Fir
	length	Wire	required	or
Size of nail	(Inches)	gauge	(inches)	southern pine	Redwood	Other species
6d	2	11 1/2	1	70	58	As
8d	2 1/2	10 1/4	1 1/4	100	82	determined
10d	3	9	1 1/2	120	98	by the
12d	3 1/4	9	1 5/8	130	106	enforcing
16d	3 1/2	8	1 5/8	160	123	agency
20d	4	6	2	190	155
30d	4 1/2	5	2 1/4	230	188
40d	5	4	2 1/2	270	220
50d	5 1/2	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	6d 8d 10d 12d 16d 20d 30d 40d 50d 60d
or Redwood	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 peretration into the piece receiving the point as set forth in Plate B-30-a. Nails or spikes, for which the wire gauge or lengths are not specified in Plate B-30-a, shall have a required penetration of not less than nine and one-half diamenters, 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; Douglar fir (coast and inland region); larch, western, 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	Diameter of bolt (inches)
bolt in main
member [FN1]
(inches)	1/2	5/8	3/4	7/8	1	1 1/8	1 1/4
1 5/8	910	1,160	1,390	1,630	1,960
2 5/8	1,150	1,700	2,190	2,610	3,010
3 5/8	1,160	1,810	2,570	3,310	3,990
4 1/2	1,160	1,810	1,600	2,530	4,480	5,380
5 1/2	-	1,810	2,620	3,550	4,610	5,800
6 1/2	-	1,810	2,600	2,550	4,630	5,850
7 1/2	-	1,810	2,600	3,550	4,630	5,850
9 1/2	-	-	2,600	3,550	4,630	5,850	7,240
11 1/2	-	-	-	-	4,630	5,850	7,240

[FN1] This assumes dressed size lumber. Safe loads for other lengths of bolt in main member may be obtained be interpolation.

TABULAR OR GRAPHIC MATERIAL SET FORTH AT THIS POINT IS NOT DISPLAYABLE

PLATE B-31-b HOLDING POWER OF BOLTS Loads Perpendicular to Grain (p)

Length of	Diameter of bolt (inches)
bolt in main
member [FN1]
(inches)	1/2	5/8	3/4	7/8	1	1 1/8	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	0,340	1,460
4 1/2	920	1,300	1,510	1,660	1,810	1,970
5 1/2	-	1,800	1,750	2,020	2,210	2,410
6 1/2	-	1,250	1,750	2,260	2,590	2,860
7 1/2	-	1,170	1,890	2,250	2,820	3,250
9 1/2	-	-	1,520	2,120	2,760	3,450	4,130
11 1/2	-	-	-	-	2,570	3,200	4,040

[FN1] This assumes dressed size lumber. Safe loads for other lengths of bolt in main member may be obtained be interpolation.

TABULAR OR GRAPHIC MATERIAL SET FORTH AT THIS POINT IS NOT DISPLAYABLE

History

1. Renembering and amendment of Plates B-29, B-29-a and B-29-b to Plate 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 HOIST

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).

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-40

PROHIBITED SCAFFOLD (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 1674)

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 SCAFFFOLD WITH POWER 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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