Trench Rescue I

presented by the…presented by the…

Office of the State Fire Marshall of Office of the State Fire Marshall of IllinoisIllinois

Course Content

IntroductionIntroduction Trench Rescue HazardsTrench Rescue Hazards OSHA RegulationsOSHA Regulations Protective Systems Protective Systems Shoring System DesignShoring System Design Rescue ShoringRescue Shoring Trench Rescue OperationsTrench Rescue Operations

Shoring System Design Design criteriaDesign criteria

Soil classificationSoil classification Never consider soil better that Class-B for rescueNever consider soil better that Class-B for rescue

Trench dimensionsTrench dimensions EquipmentEquipment

Design specificationsDesign specifications OSHA chartsOSHA charts

Timber shoring chartsTimber shoring charts

TABLE C-2.2

TIMBER TRENCH SHORING – MINIMUM TIMBER REQUIREMENTS *

SOIL TYPE B Pa = 45 X H + 72 psf (2 ft Surcharge)

SIZE (S4S) AND SPACING OF MEMBERS **

DEPTH CROSS BRACES WALES UPRIGHTS

OF HORIZ. WIDTH OF TRENCH (FEET) VERT. VERT. MAXIMUM ALLOWABLE HORIZONTAL SPACING

TRENCH SPACING UP TO UP TO UP TO UP TO UP TO SPACING SIZE SPACING (FEET)

(FEET) (FEET) 4 6 9 12 15 (FEET) (IN) (FEET) CLOSE 2 3 4 6

5

UP TO

6 4 X 6 4 X 6 4 X 6 6 X 6 6 X 6 5 6 X 8 5

3 X 12

4 X 8 4 X 12

TO

UP TO

8 4 X 6 4 X 6 6 X 6 6 X 6 6 X 6 5 8 X 8 5 3 X 8 4 X 8

10

UP TO

10 4 X 6 4 X 6 6 X 6 6 X 6 6 X 8 5 8 X 10 5 4 X 8

See

Note 1

10

UP TO

6 6 X 6 6 X 6 6 X 6 6 X 8 6 X 8 5 8 X 8 5 3 X 6 4 X 10

TO

UP TO

8 6 X 8 6 X 8 6 X 8 8 X 8 8 X 8 5 10 X 10 5 3 X 6 4 X 10

15

UP TO

10 6 X 8 6 X 8 8 X 8 8 X 8 8 X 8 5 10 X 12 5 3 X 6 4 X 10

See

Note 1

15

UP TO

6 6 X 8 6 X 8 6 X 8 6 X 8 8 X 8 5 8 X 10 5 4 X 6

TO

UP TO

8 6 X 8 6 X 8 6 X 8 8 X 8 8 X 8 5 10 X 12 5 4 X 6

20

UP TO

10 8 X 8 8 X 8 8 X 8 8 X 8 8 X 8 5 12 X 12 5 4 X 6

See

Note 1

OVER

20 SEE NOTE 1

* Douglas fir or equivalent with a bending strength not less than 1500 psi.

** Manufactured members of equivalent strength may be substituted for wood.

TABLE C-1.2

TIMBER TRENCH SHORING – MINIMUM TIMBER REQUIREMENTS *

SOIL TYPE B Pa = 45 X H + 72 psf (2 ft Surcharge)

SIZE (ACTUAL) AND SPACING OF MEMBERS **

DEPTH CROSS BRACES WALES UPRIGHTS

OF HORIZ. WIDTH OF TRENCH (FEET) VERT. VERT. MAXIMUM ALLOWABLE HORIZONTAL SPACING

TRENCH SPACING UP TO UP TO UP TO UP TO UP TO SPACING SIZE SPACING (FEET)

(FEET) (FEET) 4 6 9 12 15 (FEET) (IN) (FEET) CLOSE 2 3

5

UP TO

6 4 X 6 4 X 6 6 X 6 6 X 6 6 X 6 5 6 X 8 5 2 X 6

TO

UP TO

8 6 X 6 6 X 6 6 X 6 6 X 8 6 X 8 5 8 X 10 5 2 X 6

10

UP TO

10 6 X 6 6 X 6 6 X 6 6 X 8 6 X 8 5 10 X 10 5 2 X 6

See

Note 1

10

UP TO

6 6 X 6 6 X 6 6 X 6 6 X 8 6 X 8 5 8 X 8 5 2 X 6

TO

UP TO

8 6 X 8 6 X 8 6 X 8 8 X 8 8 X 8 5 10 X 10 5 2 X 6

15

UP TO

10 8 X 8 8 X 8 8 X 8 8 X 8 8 X 10 5 10 X 12 5 2 X 6

See

Note 1

15

UP TO

6 6 X 8 6 X 8 6 X 8 8 X 8 8 X 8 5 8 X 10 5 3 X 6

TO

UP TO

8 8 X 8 8 X 8 8 X 8 8 X 8 8 X 10 5 10 X 12 5 3 X 6

20

UP TO

10 8 X 10 8 X 10 8 X 10 8 X 10 10 X 10 5 12 X 12 5 3 X 6

See

Note 1

OVER

20 SEE NOTE 1

* Mixed oak or equivalent with a bending strength not less than 850 psi.

** Manufactured members of equivalent strength may be substituted for wood.

TABLE C-2.2

TIMBER TRENCH SHORING – MINIMUM TIMBER REQUIREMENTS *

SOIL TYPE B Pa = 45 X H + 72 psf (2 ft Surcharge)

SIZE (S4S) AND SPACING OF MEMBERS **

DEPTH CROSS BRACES WALES UPRIGHTS

OF HORIZ. WIDTH OF TRENCH (FEET) VERT. VERT. MAXIMUM ALLOWABLE HORIZONTAL SPACING

TRENCH SPACING UP TO UP TO UP TO UP TO UP TO SPACING SIZE SPACING (FEET)

(FEET) (FEET) 4 6 9 12 15 (FEET) (IN) (FEET) CLOSE 2 3 4 6

5

UP TO

6 4 X 6 4 X 6 4 X 6 6 X 6 6 X 6 5 6 X 8 5

3 X 12

4 X 8 4 X 12

TO

UP TO

8 4 X 6 4 X 6 6 X 6 6 X 6 6 X 6 5 8 X 8 5 3 X 8 4 X 8

10

UP TO

10 4 X 6 4 X 6 6 X 6 6 X 6 6 X 8 5 8 X 10 5 4 X 8

See

Note 1

10

UP TO

6 6 X 6 6 X 6 6 X 6 6 X 8 6 X 8 5 8 X 8 5 3 X 6 4 X 10

TO

UP TO

8 6 X 8 6 X 8 6 X 8 8 X 8 8 X 8 5 10 X 10 5 3 X 6 4 X 10

15

UP TO

10 6 X 8 6 X 8 8 X 8 8 X 8 8 X 8 5 10 X 12 5 3 X 6 4 X 10

See

Note 1

15

UP TO

6 6 X 8 6 X 8 6 X 8 6 X 8 8 X 8 5 8 X 10 5 4 X 6

TO

UP TO

8 6 X 8 6 X 8 6 X 8 8 X 8 8 X 8 5 10 X 12 5 4 X 6

20

UP TO

10 8 X 8 8 X 8 8 X 8 8 X 8 8 X 8 5 12 X 12 5 4 X 6

See

Note 1

OVER

20 SEE NOTE 1

* Douglas fir or equivalent with a bending strength not less than 1500 psi.

** Manufactured members of equivalent strength may be substituted for wood.

TABLE C-2.2

TIMBER TRENCH SHORING – MINIMUM TIMBER REQUIREMENTS *

SOIL TYPE B Pa = 45 X H + 72 psf (2 ft Surcharge)

SIZE (S4S) AND SPACING OF MEMBERS **

DEPTH CROSS BRACES WALES UPRIGHTS

OF HORIZ. WIDTH OF TRENCH (FEET) VERT. VERT. MAXIMUM ALLOWABLE HORIZONTAL SPACING

TRENCH SPACING UP TO UP TO UP TO UP TO UP TO SPACING SIZE SPACING (FEET)

(FEET) (FEET) 4 6 9 12 15 (FEET) (IN) (FEET) CLOSE 2 3 4 6

5

UP TO

6 4 X 6 4 X 6 4 X 6 6 X 6 6 X 6 5 6 X 8 5

3 X 12

4 X 8 4 X 12

TO

UP TO

8 4 X 6 4 X 6 6 X 6 6 X 6 6 X 6 5 8 X 8 5 3 X 8 4 X 8

10

UP TO

10 4 X 6 4 X 6 6 X 6 6 X 6 6 X 8 5 8 X 10 5 4 X 8

See

Note 1

10

UP TO

6 6 X 6 6 X 6 6 X 6 6 X 8 6 X 8 5 8 X 8 5 3 X 6 4 X 10

TO

UP TO

8 6 X 8 6 X 8 6 X 8 8 X 8 8 X 8 5 10 X 10 5 3 X 6 4 X 10

15

UP TO

10 6 X 8 6 X 8 8 X 8 8 X 8 8 X 8 5 10 X 12 5 3 X 6 4 X 10

See

Note 1

15

UP TO

6 6 X 8 6 X 8 6 X 8 6 X 8 8 X 8 5 8 X 10 5 4 X 6

TO

UP TO

8 6 X 8 6 X 8 6 X 8 8 X 8 8 X 8 5 10 X 12 5 4 X 6

20

UP TO

10 8 X 8 8 X 8 8 X 8 8 X 8 8 X 8 5 12 X 12 5 4 X 6

See

Note 1

OVER

20 SEE NOTE 1

* Douglas fir or equivalent with a bending strength not less than 1500 psi. CLASS-B Soil, Douglas fir, Rescue spacing (4’ max between crossbracdes)

** Manufactured members of equivalent strength may be substituted for wood. TRENCH DIMENSIONS: 5’ wide, 12’ deep

TABLE C-2.2

TIMBER TRENCH SHORING – MINIMUM TIMBER REQUIREMENTS *

SOIL TYPE B Pa = 45 X H + 72 psf (2 ft Surcharge)

SIZE (S4S) AND SPACING OF MEMBERS **

DEPTH CROSS BRACES WALES UPRIGHTS

OF HORIZ. WIDTH OF TRENCH (FEET) VERT. VERT. MAXIMUM ALLOWABLE HORIZONTAL SPACING

TRENCH SPACING UP TO UP TO UP TO UP TO UP TO SPACING SIZE SPACING (FEET)

(FEET) (FEET) 4 6 9 12 15 (FEET) (IN) (FEET) CLOSE 2 3 4 6

5

UP TO

6 4 X 6 4 X 6 4 X 6 6 X 6 6 X 6 5 6 X 8 5

3 X 12

4 X 8 4 X 12

TO

UP TO

8 4 X 6 4 X 6 6 X 6 6 X 6 6 X 6 5 8 X 8 5 3 X 8 4 X 8

10

UP TO

10 4 X 6 4 X 6 6 X 6 6 X 6 6 X 8 5 8 X 10 5 4 X 8

See

Note 1

10

UP TO

6 6 X 6 6 X 6 6 X 6 6 X 8 6 X 8 5 8 X 8 5 3 X 6 4 X 10

TO

UP TO

8 6 X 8 6 X 8 6 X 8 8 X 8 8 X 8 5 10 X 10 5 3 X 6 4 X 10

15

UP TO

10 6 X 8 6 X 8 8 X 8 8 X 8 8 X 8 5 10 X 12 5 3 X 6 4 X 10

See

Note 1

15

UP TO

6 6 X 8 6 X 8 6 X 8 6 X 8 8 X 8 5 8 X 10 5 4 X 6

TO

UP TO

8 6 X 8 6 X 8 6 X 8 8 X 8 8 X 8 5 10 X 12 5 4 X 6

20

UP TO

10 8 X 8 8 X 8 8 X 8 8 X 8 8 X 8 5 12 X 12 5 4 X 6

See

Note 1

OVER

20 SEE NOTE 1

* Douglas fir or equivalent with a bending strength not less than 1500 psi. CLASS-B Soil, Douglas fir, Rescue spacing (4’ max between crossbracdes)

** Manufactured members of equivalent strength may be substituted for wood. TRENCH DIMENSIONS: 5’ wide, 12’ deep

TABLE C-2.2

TIMBER TRENCH SHORING – MINIMUM TIMBER REQUIREMENTS *

SOIL TYPE B Pa = 45 X H + 72 psf (2 ft Surcharge)

SIZE (S4S) AND SPACING OF MEMBERS **

DEPTH CROSS BRACES WALES UPRIGHTS

OF HORIZ. WIDTH OF TRENCH (FEET) VERT. VERT. MAXIMUM ALLOWABLE HORIZONTAL SPACING

TRENCH SPACING UP TO UP TO UP TO UP TO UP TO SPACING SIZE SPACING (FEET)

(FEET) (FEET) 4 6 9 12 15 (FEET) (IN) (FEET) CLOSE 2 3 4 6

5

UP TO

6 4 X 6 4 X 6 4 X 6 6 X 6 6 X 6 5 6 X 8 5

3 X 12

4 X 8 4 X 12

TO

UP TO

8 4 X 6 4 X 6 6 X 6 6 X 6 6 X 6 5 8 X 8 5 3 X 8 4 X 8

10

UP TO

10 4 X 6 4 X 6 6 X 6 6 X 6 6 X 8 5 8 X 10 5 4 X 8

See

Note 1

10

UP TO

6 6 X 6 6 X 6 6 X 6 6 X 8 6 X 8 5 8 X 8 5 3 X 6 4 X 10

TO

UP TO

8 6 X 8 6 X 8 6 X 8 8 X 8 8 X 8 5 10 X 10 5 3 X 6 4 X 10

15

UP TO

10 6 X 8 6 X 8 8 X 8 8 X 8 8 X 8 5 10 X 12 5 3 X 6 4 X 10

See

Note 1

15

UP TO

6 6 X 8 6 X 8 6 X 8 6 X 8 8 X 8 5 8 X 10 5 4 X 6

TO

UP TO

8 6 X 8 6 X 8 6 X 8 8 X 8 8 X 8 5 10 X 12 5 4 X 6

20

UP TO

10 8 X 8 8 X 8 8 X 8 8 X 8 8 X 8 5 12 X 12 5 4 X 6

See

Note 1

OVER

20 SEE NOTE 1

* Douglas fir or equivalent with a bending strength not less than 1500 psi. CLASS-B Soil, Douglas fir, Rescue spacing (4’ max between crossbracdes)

** Manufactured members of equivalent strength may be substituted for wood. TRENCH DIMENSIONS: 5’ wide, 12’ deep

TABLE C-2.2

TIMBER TRENCH SHORING – MINIMUM TIMBER REQUIREMENTS *

SOIL TYPE B Pa = 45 X H + 72 psf (2 ft Surcharge)

SIZE (S4S) AND SPACING OF MEMBERS **

DEPTH CROSS BRACES WALES UPRIGHTS

OF HORIZ. WIDTH OF TRENCH (FEET) VERT. VERT. MAXIMUM ALLOWABLE HORIZONTAL SPACING

TRENCH SPACING UP TO UP TO UP TO UP TO UP TO SPACING SIZE SPACING (FEET)

(FEET) (FEET) 4 6 9 12 15 (FEET) (IN) (FEET) CLOSE 2 3 4 6

5

UP TO

6 4 X 6 4 X 6 4 X 6 6 X 6 6 X 6 5 6 X 8 5

3 X 12

4 X 8 4 X 12

TO

UP TO

8 4 X 6 4 X 6 6 X 6 6 X 6 6 X 6 5 8 X 8 5 3 X 8 4 X 8

10

UP TO

10 4 X 6 4 X 6 6 X 6 6 X 6 6 X 8 5 8 X 10 5 4 X 8

See

Note 1

10

UP TO

6 6 X 6 6 X 6 6 X 6 6 X 8 6 X 8 5 8 X 8 5 3 X 6 4 X 10

TO

UP TO

8 6 X 8 6 X 8 6 X 8 8 X 8 8 X 8 5 10 X 10 5 3 X 6 4 X 10

15

UP TO

10 6 X 8 6 X 8 8 X 8 8 X 8 8 X 8 5 10 X 12 5 3 X 6 4 X 10

See

Note 1

15

UP TO

6 6 X 8 6 X 8 6 X 8 6 X 8 8 X 8 5 8 X 10 5 4 X 6

TO

UP TO

8 6 X 8 6 X 8 6 X 8 8 X 8 8 X 8 5 10 X 12 5 4 X 6

20

UP TO

10 8 X 8 8 X 8 8 X 8 8 X 8 8 X 8 5 12 X 12 5 4 X 6

See

Note 1

OVER

20 SEE NOTE 1

* Douglas fir or equivalent with a bending strength not less than 1500 psi. CLASS-B Soil, Douglas fir, Rescue spacing (4’ max between crossbracdes)

** Manufactured members of equivalent strength may be substituted for wood. TRENCH DIMENSIONS: 5’ wide, 12’ deep

TABLE C-2.2

TIMBER TRENCH SHORING – MINIMUM TIMBER REQUIREMENTS *

SOIL TYPE B Pa = 45 X H + 72 psf (2 ft Surcharge)

SIZE (S4S) AND SPACING OF MEMBERS **

DEPTH CROSS BRACES WALES UPRIGHTS

OF HORIZ. WIDTH OF TRENCH (FEET) VERT. VERT. MAXIMUM ALLOWABLE HORIZONTAL SPACING

TRENCH SPACING UP TO UP TO UP TO UP TO UP TO SPACING SIZE SPACING (FEET)

(FEET) (FEET) 4 6 9 12 15 (FEET) (IN) (FEET) CLOSE 2 3 4 6

5

UP TO

6 4 X 6 4 X 6 4 X 6 6 X 6 6 X 6 5 6 X 8 5

3 X 12

4 X 8 4 X 12

TO

UP TO

8 4 X 6 4 X 6 6 X 6 6 X 6 6 X 6 5 8 X 8 5 3 X 8 4 X 8

10

UP TO

10 4 X 6 4 X 6 6 X 6 6 X 6 6 X 8 5 8 X 10 5 4 X 8

See

Note 1

10

UP TO

6 6 X 6 6 X 6 6 X 6 6 X 8 6 X 8 5 8 X 8 5 3 X 6 4 X 10

TO

UP TO

8 6 X 8 6 X 8 6 X 8 8 X 8 8 X 8 5 10 X 10 5 3 X 6 4 X 10

15

UP TO

10 6 X 8 6 X 8 8 X 8 8 X 8 8 X 8 5 10 X 12 5 3 X 6 4 X 10

See

Note 1

15

UP TO

6 6 X 8 6 X 8 6 X 8 6 X 8 8 X 8 5 8 X 10 5 4 X 6

TO

UP TO

8 6 X 8 6 X 8 6 X 8 8 X 8 8 X 8 5 10 X 12 5 4 X 6

20

UP TO

10 8 X 8 8 X 8 8 X 8 8 X 8 8 X 8 5 12 X 12 5 4 X 6

See

Note 1

OVER

20 SEE NOTE 1

* Douglas fir or equivalent with a bending strength not less than 1500 psi. CLASS-B Soil, Douglas fir, Rescue spacing (4’ max between crossbracdes)

** Manufactured members of equivalent strength may be substituted for wood. TRENCH DIMENSIONS: 5’ wide, 12’ deep

TABLE C-2.2

TIMBER TRENCH SHORING – MINIMUM TIMBER REQUIREMENTS *

SOIL TYPE B Pa = 45 X H + 72 psf (2 ft Surcharge)

SIZE (S4S) AND SPACING OF MEMBERS **

DEPTH CROSS BRACES WALES UPRIGHTS

OF HORIZ. WIDTH OF TRENCH (FEET) VERT. VERT. MAXIMUM ALLOWABLE HORIZONTAL SPACING

TRENCH SPACING UP TO UP TO UP TO UP TO UP TO SPACING SIZE SPACING (FEET)

(FEET) (FEET) 4 6 9 12 15 (FEET) (IN) (FEET) CLOSE 2 3 4 6

5

UP TO

6 4 X 6 4 X 6 4 X 6 6 X 6 6 X 6 5 6 X 8 5

3 X 12

4 X 8 4 X 12

TO

UP TO

8 4 X 6 4 X 6 6 X 6 6 X 6 6 X 6 5 8 X 8 5 3 X 8 4 X 8

10

UP TO

10 4 X 6 4 X 6 6 X 6 6 X 6 6 X 8 5 8 X 10 5 4 X 8

See

Note 1

10

UP TO

6 6 X 6 6 X 6 6 X 6 6 X 8 6 X 8 5 8 X 8 5 3 X 6 4 X 10

TO

UP TO

8 6 X 8 6 X 8 6 X 8 8 X 8 8 X 8 5 10 X 10 5 3 X 6 4 X 10

15

UP TO

10 6 X 8 6 X 8 8 X 8 8 X 8 8 X 8 5 10 X 12 5 3 X 6 4 X 10

See

Note 1

15

UP TO

6 6 X 8 6 X 8 6 X 8 6 X 8 8 X 8 5 8 X 10 5 4 X 6

TO

UP TO

8 6 X 8 6 X 8 6 X 8 8 X 8 8 X 8 5 10 X 12 5 4 X 6

20

UP TO

10 8 X 8 8 X 8 8 X 8 8 X 8 8 X 8 5 12 X 12 5 4 X 6

See

Note 1

OVER

20 SEE NOTE 1

* Douglas fir or equivalent with a bending strength not less than 1500 psi. CLASS-B Soil, Douglas fir, Rescue spacing (4’ max between crossbracdes)

** Manufactured members of equivalent strength may be substituted for wood. TRENCH DIMENSIONS: 5’ wide, 12’ deep

TABLE C-2.2

TIMBER TRENCH SHORING – MINIMUM TIMBER REQUIREMENTS *

SOIL TYPE B Pa = 45 X H + 72 psf (2 ft Surcharge)

SIZE (S4S) AND SPACING OF MEMBERS **

DEPTH CROSS BRACES WALES UPRIGHTS

OF HORIZ. WIDTH OF TRENCH (FEET) VERT. VERT. MAXIMUM ALLOWABLE HORIZONTAL SPACING

TRENCH SPACING UP TO UP TO UP TO UP TO UP TO SPACING SIZE SPACING (FEET)

(FEET) (FEET) 4 6 9 12 15 (FEET) (IN) (FEET) CLOSE 2 3 4 6

5

UP TO

6 4 X 6 4 X 6 4 X 6 6 X 6 6 X 6 5 6 X 8 5

3 X 12

4 X 8 4 X 12

TO

UP TO

8 4 X 6 4 X 6 6 X 6 6 X 6 6 X 6 5 8 X 8 5 3 X 8 4 X 8

10

UP TO

10 4 X 6 4 X 6 6 X 6 6 X 6 6 X 8 5 8 X 10 5 4 X 8

See

Note 1

10

UP TO

6 6 X 6 6 X 6 6 X 6 6 X 8 6 X 8 5 8 X 8 5 3 X 6 4 X 10

TO

UP TO

8 6 X 8 6 X 8 6 X 8 8 X 8 8 X 8 5 10 X 10 5 3 X 6 4 X 10

15

UP TO

10 6 X 8 6 X 8 8 X 8 8 X 8 8 X 8 5 10 X 12 5 3 X 6 4 X 10

See

Note 1

15

UP TO

6 6 X 8 6 X 8 6 X 8 6 X 8 8 X 8 5 8 X 10 5 4 X 6

TO

UP TO

8 6 X 8 6 X 8 6 X 8 8 X 8 8 X 8 5 10 X 12 5 4 X 6

20

UP TO

10 8 X 8 8 X 8 8 X 8 8 X 8 8 X 8 5 12 X 12 5 4 X 6

See

Note 1

OVER

20 SEE NOTE 1

* Douglas fir or equivalent with a bending strength not less than 1500 psi. CLASS-B Soil, Douglas fir, Rescue spacing (4’ max between crossbracdes)

** Manufactured members of equivalent strength may be substituted for wood. TRENCH DIMENSIONS: 5’ wide, 12’ deep

Shoring System Design Design criteriaDesign criteria

Soil classificationSoil classification Never consider soil better that Class-B for rescueNever consider soil better that Class-B for rescue

Trench dimensionsTrench dimensions EquipmentEquipment

Design specificationsDesign specifications OSHA chartsOSHA charts

Timber shoring chartsTimber shoring charts Hydraulic shoring chartsHydraulic shoring charts

TABLE D - 1.2ALUMINUM HYDRAULIC SHORING

VERTICAL SHORESFOR SOIL TYPE B

HYDRAULIC CYLINDERS

WIDTH OF TRENCH (FEET)

DEPTHOF

TRENCH

(FEET)

MAXIMUMHORIZONTAL

SPACING

(FEET)

MAXIMUMVERTICALSPACING

(FEET)

UP TO 8 OVER 8 UPTO 12

OVER 12 UPTO 15

OVER5

UP TO10

8

0VER10

UP TO15

6.5 4 2 INCHDIAMETER

2 INCHDIAMETER

NOTE (2)

3 INCHDIAMETER

OVER15

UP TO20

5.5

OVER 20 NOTE (1)

Footnotes to tables, and general notes on hydraulic shoring, are found in Appendix D, Item (g)Note (1): See Appendix D, Item (g) (1)Note (2): See Appendix D, Item (g) (2)

TABLE D - 1.3ALUMINUM HYDRAULIC SHORING

WALER SYSTEMSFOR SOIL TYPE B

WALES HYDRAULIC CYLINDERS TIMBER UPRIGHTS

DEPTH WIDTH OF TRENCH (FEET)MAX. HORIZ. SPACING

(ON CENTER)OF

TRENCHVERTICALSPACING

SECTION *MODULUS UP TO 8 OVER 8 UP TO 12 OVER 12 UP TO 15 SOLID 2 FT. 3 FT.

(FEET) (FEET) (IN3)HORIZ.

SPACINGCYLINDERDIAMETER

HORIZ.SPACING

CYLINDERDIAMETER

HORIZ.SPACING

CYLINDERDIAMETER

SHEET

OVER 3.5 8.0 2 IN 8.02 IN

NOTE(2) 8.0 3 IN5

UP TO 4 7.0 9.0 2 IN 9.02 IN

NOTE(2) 9.0 3 IN ------- ------- 3 x 1210

14.0 12.0 3 IN 12.0 3 IN 12.0 3 IN

OVER 3.5 6.0 2 IN 6.02 IN

NOTE(2) 6.0 3 IN

10UP TO 4 7.0 8.0 3 IN 8.0 3 IN 8.0 3 IN ------- 3 x 12 -------

1514.0 10.0 3 IN 10.0 3 IN 10.0 3 IN

OVER 3.5 5.5 2 IN 5.52 IN

NOTE(2) 5.5 3 IN15

UP TO 4 7.0 6.0 3 IN 6.0 3 IN 6.0 3 IN 3 x 12 ------- -------

2014.0 9.0 3 IN 9.0 3 IN 9.0 3 IN

OVER 20 NOTE (1)

Footnotes to tables, and general notes on hydraulic shoring, are found in Appendix D, Item (g)Notes (1): See Appendix D, item (g) (1)Notes (2): See Appendix D, item (g) (2)* Consult product manufacturer and/or qualified engineer for Section Modulus of available wales.

TABLE D - 1.2ALUMINUM HYDRAULIC SHORING

VERTICAL SHORESFOR SOIL TYPE B

HYDRAULIC CYLINDERS

WIDTH OF TRENCH (FEET)

DEPTHOF

TRENCH

(FEET)

MAXIMUMHORIZONTAL

SPACING

(FEET)

MAXIMUMVERTICALSPACING

(FEET)

UP TO 8 OVER 8 UPTO 12

OVER 12 UPTO 15

OVER5

UP TO10

8

0VER10

UP TO15

6.5 4 2 INCHDIAMETER

2 INCHDIAMETER

NOTE (2)

3 INCHDIAMETER

OVER15

UP TO20

5.5

OVER 20 NOTE (1)

Footnotes to tables, and general notes on hydraulic shoring, are found in Appendix D, Item (g) TRENCH DIMENSIONS: 5’ wide, 12’ deep

Note (1): See Appendix D, Item (g) (1)Note (2): See Appendix D, Item (g) (2)

TABLE D - 1.2ALUMINUM HYDRAULIC SHORING

VERTICAL SHORESFOR SOIL TYPE B

HYDRAULIC CYLINDERS

WIDTH OF TRENCH (FEET)

DEPTHOF

TRENCH

(FEET)

MAXIMUMHORIZONTAL

SPACING

(FEET)

MAXIMUMVERTICALSPACING

(FEET)

UP TO 8 OVER 8 UPTO 12

OVER 12 UPTO 15

OVER5

UP TO10

8

0VER10

UP TO15

6.5 4 2 INCHDIAMETER

2 INCHDIAMETER

NOTE (2)

3 INCHDIAMETER

OVER15

UP TO20

5.5

OVER 20 NOTE (1)

Footnotes to tables, and general notes on hydraulic shoring, are found in Appendix D, Item (g) TRENCH DIMENSIONS: 5’ wide, 12’ deep

Note (1): See Appendix D, Item (g) (1)Note (2): See Appendix D, Item (g) (2)

TABLE D - 1.2ALUMINUM HYDRAULIC SHORING

VERTICAL SHORESFOR SOIL TYPE B

HYDRAULIC CYLINDERS

WIDTH OF TRENCH (FEET)

DEPTHOF

TRENCH

(FEET)

MAXIMUMHORIZONTAL

SPACING

(FEET)

MAXIMUMVERTICALSPACING

(FEET)

UP TO 8 OVER 8 UPTO 12

OVER 12 UPTO 15

OVER5

UP TO10

8

0VER10

UP TO15

6.5 4 2 INCHDIAMETER

2 INCHDIAMETER

NOTE (2)

3 INCHDIAMETER

OVER15

UP TO20

5.5

OVER 20 NOTE (1)

Footnotes to tables, and general notes on hydraulic shoring, are found in Appendix D, Item (g) TRENCH DIMENSIONS: 5’ wide, 12’ deep

Note (1): See Appendix D, Item (g) (1)Note (2): See Appendix D, Item (g) (2)

TABLE D - 1.2ALUMINUM HYDRAULIC SHORING

VERTICAL SHORESFOR SOIL TYPE B

HYDRAULIC CYLINDERS

WIDTH OF TRENCH (FEET)

DEPTHOF

TRENCH

(FEET)

MAXIMUMHORIZONTAL

SPACING

(FEET)

MAXIMUMVERTICALSPACING

(FEET)

UP TO 8 OVER 8 UPTO 12

OVER 12 UPTO 15

OVER5

UP TO10

8

0VER10

UP TO15

6.5 4 2 INCHDIAMETER

2 INCHDIAMETER

NOTE (2)

3 INCHDIAMETER

OVER15

UP TO20

5.5

OVER 20 NOTE (1)

Footnotes to tables, and general notes on hydraulic shoring, are found in Appendix D, Item (g) TRENCH DIMENSIONS: 5’ wide, 12’ deep

Note (1): See Appendix D, Item (g) (1)Note (2): See Appendix D, Item (g) (2)

Appendix D to Subpart PItem (g)

Aluminum Hydraulic Shoring for Trenches

Item (g) Footnotes, and general notes, for Tables D-1.1, D-1.2, D-1.3, and D-1.4.

(1) For applications other than those listed in the tables, refer to § 1926.652 (c)(2) for use of manufacturer’s tabulated data. For trench depths in excess of 20 feet, refer to § 1926.652 (c)(2) and § 1926.652 (c)(3).

(2) 2 inch diameter cylinders, at this width, shall have structural steel tube (3.5 x 3.5 x 0.1875) oversleeves, or structural oversleeves of manufacturer’s specification, extending the full, collapsed length.

(3) Hydraulic cylinders capacities.(i) 2-inch cylinders shall be a minimum 2-inch inside diameter with a safe working capacity of not less than 18,000 pounds axial compressive load at

maximum extension. Maximum extension is to include full range of cylinder extensions as recommended by product manufacturer.(ii) 3-inch cylinders shall be a minimum 3-inch inside diameter with a safe working capacity of not less than 30,000 pounds axial compressive load at

maximum extension. Maximum extension is to include full range of cylinder extensions as recommended by product manufacturer.

(4) All spacing indicated is measured center to center

(5) Vertical shoring rails shall have a minimum section modulus of 0.40 inch.

(6) When vertical shores are used, there must be a minimum of three shores spaced equally, horizontally, in a group.

(7) Plywood shall be 1.125 in. thick softwood or 0.75 inch thick, 14 ply, arctic white birch (Finland form). Please not that plywood is not intended as a structural member, but only for prevention of local raveling (sloughing of the trench face) between shores.

(8) See appendix C for timber specifications.

(9) Wales are calculated for simple span conditions

(10) See appendix D, item (d) for basis and limitations of the data.

Appendix D to Subpart PItem (g)

Aluminum Hydraulic Shoring for Trenches

Item (g) Footnotes, and general notes, for Tables D-1.1, D-1.2, D-1.3, and D-1.4.

(1) For applications other than those listed in the tables, refer to § 1926.652 (c)(2) for use of manufacturer’s tabulated data. For trench depths in excess of 20 feet, refer to § 1926.652 (c)(2) and § 1926.652 (c)(3).

(2) 2 inch diameter cylinders, at this width, shall have structural steel tube (3.5 x 3.5 x 0.1875) oversleeves, or structural oversleeves of manufacturer’s specification, extending the full, collapsed length.

(3) Hydraulic cylinders capacities.(i) 2-inch cylinders shall be a minimum 2-inch inside diameter with a safe working capacity of not less than 18,000 pounds axial compressive load at

maximum extension. Maximum extension is to include full range of cylinder extensions as recommended by product manufacturer.(ii) 3-inch cylinders shall be a minimum 3-inch inside diameter with a safe working capacity of not less than 30,000 pounds axial compressive load at

maximum extension. Maximum extension is to include full range of cylinder extensions as recommended by product manufacturer.

(4) All spacing indicated is measured center to center

(5) Vertical shoring rails shall have a minimum section modulus of 0.40 inch.

(6) When vertical shores are used, there must be a minimum of three shores spaced equally, horizontally, in a group.

(7) Plywood shall be 1.125 in. thick softwood or 0.75 inch thick, 14 ply, arctic white birch (Finland form). Please not that plywood is not intended as a structural member, but only for prevention of local raveling (sloughing of the trench face) between shores.

(8) See appendix C for timber specifications.

(9) Wales are calculated for simple span conditions

(10) See appendix D, item (d) for basis and limitations of the data.

Shoring System Design Design criteriaDesign criteria

Soil classificationSoil classification Never consider soil better that Class-B for rescueNever consider soil better that Class-B for rescue

Trench dimensionsTrench dimensions EquipmentEquipment

Design specificationsDesign specifications OSHA chartsOSHA charts

Timber shoring chartsTimber shoring charts Hydraulic shoring chartsHydraulic shoring charts

Manufacturer’s tabulated dataManufacturer’s tabulated data

AIRSHORE SAFETY LIMIT TABLEC-1

FOR USE IN EXCAVATIONS SHORED IN ACCORDANCE WITHTHE DEPARTMENT OF LABOUR

OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATIONCONSTRUCTION INDUSTRY STANDARD - SUBPART P OF PART 1926

SOILTYPE

DEPTHOF

TRENCH(Feet)

WIDTHOF

TRENCH(Feet)

MAXIMUMHORIZONTAL

SPACING(Feet)

MAXIMUMVERTICALSPACING

(Feet)Over 5 Up to 6 12 4Up to 10 6 to 12 6 4Over 10 Up to 6 12 4

A Up to 15 6 to 12 6 4Over 15 Up to 6 6 4

6 to 9 4.5 4Up to 20 9 to 12 4 4Over 5 Up to 6 8 4Up to 10 6 to 12 6 4Over 10 Up to 6 6 4

B Up to 15 6 to 12 5 4Over 15 Up to 6 5 4

6 to 9 4 4Up to 20 9 to 12 3.5 4Over 5 Up to 6 8 4Up to 10 6 to 12 6 4Over 10 Up to 6 6 4

C Up to 15 6 to 12 4 4Over 15 Up to 6 4 4

6 to 9 3 4Up to 20 9 to 12 2.75 4

USERS ARE ADVISED TO CHECK LOCAL SHORING AND SAFETY REQUIREMENTSOSHA REFERENCES

TIMBER REQUIREMENTS - MIXED OAK TABLES C-1.1, C-1.2, C-1.3SOIL CLASSIFICATIONS - Appendix A of Subpart P of Part 1926Shoring Configurations Deviating from this Table are not AllowedUnless in Accordance with the Requirements of Part 1926.652

AIRSHORE SAFETY LIMIT TABLEC-2

FOR USE IN EXCAVATIONS SHORED IN ACCORDANCE WITHTHE DEPARTMENT OF LABOUR

OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATIONCONSTRUCTION INDUSTRY STANDARD - SUBPART P OF PART 1926

SOILTYPE

DEPTHOF

TRENCH(Feet)

WIDTHOF

TRENCH(Feet)

MAXIMUMHORIZONTAL

SPACING(Feet)

MAXIMUMVERTICALSPACING

(Feet)Over 5 Up to 6 12 4Up to 10 6 to 12 8 4Over 10 Up to 6 12 4

A Up to 15 6 to 12 8 4Over 15 Up to 6 8 4Up to 20 6 to 12 6 4Over 5 Up to 6 10 4Up to 10 6 to 12 8 4Over 10 Up to 6 6 4

B Up to 15 6 to 12 5 4Over 15 Up to 6 6 4

6 to 9 5 4Up to 20 9 to 12 4 4Over 5 Up to 6 8 4Up to 10 6 to 12 6 4Over 10 Up to 6 6 4

C Up to 15 6 to 12 4 4Over 15 Up to 6 4 4Up to 20 6 to 12 3 4

USERS ARE ADVISED TO CHECK LOCAL SHORING AND SAFETY REQUIREMENTSOSHA REFERENCES

TIMBER REQUIREMENTS - DOUGLAS FIR Tables C-2.1, C-2.2, C-2.3SOIL CLASSIFICATIONS - Appendix A of Subpart P of Part 1926Shoring Configurations Deviating from this Table are not AllowedUnless in Accordance with the Requirements of Part 1926.652

AIRSHORE SAFETY LIMIT TABLEC-1

FOR USE IN EXCAVATIONS SHORED IN ACCORDANCE WITHTHE DEPARTMENT OF LABOUR

OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATIONCONSTRUCTION INDUSTRY STANDARD - SUBPART P OF PART 1926

SOILTYPE

DEPTHOF

TRENCH(Feet)

WIDTHOF

TRENCH(Feet)

MAXIMUMHORIZONTAL

SPACING(Feet)

MAXIMUMVERTICALSPACING

(Feet)Over 5 Up to 6 12 4Up to 10 6 to 12 6 4Over 10 Up to 6 12 4

A Up to 15 6 to 12 6 4Over 15 Up to 6 6 4

6 to 9 4.5 4Up to 20 9 to 12 4 4Over 5 Up to 6 8 4Up to 10 6 to 12 6 4Over 10 Up to 6 6 4

B Up to 15 6 to 12 5 4Over 15 Up to 6 5 4

6 to 9 4 4Up to 20 9 to 12 3.5 4Over 5 Up to 6 8 4Up to 10 6 to 12 6 4Over 10 Up to 6 6 4

C Up to 15 6 to 12 4 4Over 15 Up to 6 4 4

6 to 9 3 4Up to 20 9 to 12 2.75 4

USERS ARE ADVISED TO CHECK LOCAL SHORING AND SAFETY REQUIREMENTSOSHA REFERENCES

TIMBER REQUIREMENTS - MIXED OAK TABLES C-1.1, C-1.2, C-1.3SOIL CLASSIFICATIONS - Appendix A of Subpart P of Part 1926Shoring Configurations Deviating from this Table are not AllowedUnless in Accordance with the Requirements of Part 1926.652

AIRSHORE SAFETY LIMIT TABLEC-1

FOR USE IN EXCAVATIONS SHORED IN ACCORDANCE WITHTHE DEPARTMENT OF LABOUR

OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATIONCONSTRUCTION INDUSTRY STANDARD - SUBPART P OF PART 1926

SOILTYPE

DEPTHOF

TRENCH(Feet)

WIDTHOF

TRENCH(Feet)

MAXIMUMHORIZONTAL

SPACING(Feet)

MAXIMUMVERTICALSPACING

(Feet)Over 5 Up to 6 12 4Up to 10 6 to 12 6 4Over 10 Up to 6 12 4

A Up to 15 6 to 12 6 4Over 15 Up to 6 6 4

6 to 9 4.5 4Up to 20 9 to 12 4 4Over 5 Up to 6 8 4Up to 10 6 to 12 6 4Over 10 Up to 6 6 4

B Up to 15 6 to 12 5 4Over 15 Up to 6 5 4

6 to 9 4 4Up to 20 9 to 12 3.5 4Over 5 Up to 6 8 4Up to 10 6 to 12 6 4Over 10 Up to 6 6 4

C Up to 15 6 to 12 4 4Over 15 Up to 6 4 4

6 to 9 3 4Up to 20 9 to 12 2.75 4

USERS ARE ADVISED TO CHECK LOCAL SHORING AND SAFETY REQUIREMENTSOSHA REFERENCES

TIMBER REQUIREMENTS - MIXED OAK TABLES C-1.1, C-1.2, C-1.3SOIL CLASSIFICATIONS - Appendix A of Subpart P of Part 1926Shoring Configurations Deviating from this Table are not AllowedUnless in Accordance with the Requirements of Part 1926.652

AIRSHORE SAFETY LIMIT TABLEC-1

FOR USE IN EXCAVATIONS SHORED IN ACCORDANCE WITHTHE DEPARTMENT OF LABOUR

OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATIONCONSTRUCTION INDUSTRY STANDARD - SUBPART P OF PART 1926

SOILTYPE

DEPTHOF

TRENCH(Feet)

WIDTHOF

TRENCH(Feet)

MAXIMUMHORIZONTAL

SPACING(Feet)

MAXIMUMVERTICALSPACING

(Feet)Over 5 Up to 6 12 4Up to 10 6 to 12 6 4Over 10 Up to 6 12 4

A Up to 15 6 to 12 6 4Over 15 Up to 6 6 4

6 to 9 4.5 4Up to 20 9 to 12 4 4Over 5 Up to 6 8 4Up to 10 6 to 12 6 4Over 10 Up to 6 6 4

B Up to 15 6 to 12 5 4Over 15 Up to 6 5 4

6 to 9 4 4Up to 20 9 to 12 3.5 4Over 5 Up to 6 8 4Up to 10 6 to 12 6 4Over 10 Up to 6 6 4

C Up to 15 6 to 12 4 4Over 15 Up to 6 4 4

6 to 9 3 4Up to 20 9 to 12 2.75 4

USERS ARE ADVISED TO CHECK LOCAL SHORING AND SAFETY REQUIREMENTSOSHA REFERENCES

TIMBER REQUIREMENTS - MIXED OAK TABLES C-1.1, C-1.2, C-1.3SOIL CLASSIFICATIONS - Appendix A of Subpart P of Part 1926Shoring Configurations Deviating from this Table are not AllowedUnless in Accordance with the Requirements of Part 1926.652

AIRSHORE SAFETY LIMIT TABLEC-1

FOR USE IN EXCAVATIONS SHORED IN ACCORDANCE WITHTHE DEPARTMENT OF LABOUR

OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATIONCONSTRUCTION INDUSTRY STANDARD - SUBPART P OF PART 1926

SOILTYPE

DEPTHOF

TRENCH(Feet)

WIDTHOF

TRENCH(Feet)

MAXIMUMHORIZONTAL

SPACING(Feet)

MAXIMUMVERTICALSPACING

(Feet)Over 5 Up to 6 12 4Up to 10 6 to 12 6 4Over 10 Up to 6 12 4

A Up to 15 6 to 12 6 4Over 15 Up to 6 6 4

6 to 9 4.5 4Up to 20 9 to 12 4 4Over 5 Up to 6 8 4Up to 10 6 to 12 6 4Over 10 Up to 6 6 4

B Up to 15 6 to 12 5 4Over 15 Up to 6 5 4

6 to 9 4 4Up to 20 9 to 12 3.5 4Over 5 Up to 6 8 4Up to 10 6 to 12 6 4Over 10 Up to 6 6 4

C Up to 15 6 to 12 4 4Over 15 Up to 6 4 4

6 to 9 3 4Up to 20 9 to 12 2.75 4

USERS ARE ADVISED TO CHECK LOCAL SHORING AND SAFETY REQUIREMENTSOSHA REFERENCES

TIMBER REQUIREMENTS - MIXED OAK TABLES C-1.1, C-1.2, C-1.3SOIL CLASSIFICATIONS - Appendix A of Subpart P of Part 1926Shoring Configurations Deviating from this Table are not AllowedUnless in Accordance with the Requirements of Part 1926.652

MULTISHORE SYSTEM - - - AIRSHORE INTERNATIONALFOR USE WITH ALL AIRSHORE SIZES AT MAXIMUM EXTENSION WITH MAXIMUM STRUT SPACING AS SPECIFIED ON THIS CHART

NO SURCHARGE HAS BEEN INCLUDED IN THE DEPTH CALCULATIONS.DEPTH OF SOIL TYPE TRENCH WIDTH UP TO A MAX. OF 6’ (1.8m) TRENCH WIDTH UP TO A MAX. OF 12’ (3.5m)TRENCH

FT (m)VERTICAL

FT (m)HORIZONTAL

FT (m)VERTICAL

FT (m)HORIZONTAL

FT (m)10’ (3m)

ORLESS

ABC

4’ (1.2)4’ (1.2)4’ (1.2)

8’ (2.4)8’ (2.4)6’ (1.8)

4’ (1.2)4’ (1.2)4’ (1.2)

8’ (2.4)8’ (2.4)6’ (1.8)

10’ (3m)TO

15’ (4.6)

ABC

4’ (1.2)4’ (1.2)4’ (1.2)

8’ (2.4)8’ (2.4)4’ (1.2)

4’ (1.2)4’ (1.2)4’ (1.2)

8’ (2.4)6’ (1.8)4’ (1.2)

15’ (4.6)TO

20’ (6.0)

ABC

4’ (1.2)4’ (1.2)4’ (1.2)

8’ (2.4)6’ (1.7)4’ (1.2)

4’ (1.2)4’ (1.2)4’ (1.2)

6’ (1.8)5’ (1.5)4’ (1.2)

SECTION 38.08 SHALL APPLY:THE SPECIFIED TRENCH DEPTH SHALL BE REDUCED IF EQUIPMENT OR OTHER HEAVY OBJECTS ARE LOCATED OR OPERATED CLOSE TO THEEDGE OF THE EXCAVATION (WITHIN THE SOIL FAILURE ZONE) OR IF THE EXCAVATIONS ARE ADJACENT TO OR ABUTTING BUILDINGS OR OTHERSTRUCTURES OR A HAZARD IS CREATEED BY VIBRATIONS FROM NEARBY EQUIPMENT OR FROM PASSING VEHICULAR TRAFFIC AND THEREVISED DEPTH SHALL BE SPECIFIED BY A PROFESSIONAL ENGINEER.

SOIL FAILURE ZONE:THE AREA ON EACH SIDE OF THE TRENCH EQUAL TO THE DEPTH OF THE TRENCH.

SECTION 38.06A (1) & (2) SHALL APPLY:THE SYSTEM SHALL EXTEND FROM AT LEAST 12 INCHES (30cm) ABOVE THE GROUND LEVEL TO OR CLOSE TOTHE BOTTOM OF THE TRENCH AS PERMITTED BY THE MATERIAL BEING INSTALLED IN THE TRENCH, BUT IN NO CASE MORE THAN 2FEET (61cm) FROM THE BOTTOM TRENCH.

SECTION 38.06A (8)(b)(8)(b) MEANS SHALL BE PROVIDED TO ENSURE THAT THE PNEUMATIC JACKS WILL NOT COLLAPSE IN THE EVENT OF LOSS OF INTERNALPRESSURE.

DRAWING PREPARED FOR THE PROVINCE OF BRITISH COLUMBIA

MULTISHORE SYSTEM

DATE: MARCH 4/96

FILE: 96500BC

PAGE: 2 OF 6

SUPPLIED/MANUFACTURED BY:

AIRSHORE INTERNATIONAL, LANGLEY B.C.UNIT #3 19695—92A AVENUE, LANGLEY B.C., VIM 3B3

PHONE: 604-882-8874 FAX: 604-882-3118ENGINEER

J.H. VINCENT SERVICESA DIVISION OF 509228 ONTARIO LIMITED

LONDON, ONTARIOPJONE: 519-472-9068

DATE:

MARCH 4/96

FILE NUMBER:

96500BC

PAGE:

1 OF 6

SOIL TYPE & SOIL PRESSURE

SOIL TYPE Ka w (PCF) Pa=PSF/FTTYPE ATYPE BTYPE C-60

0.2 0.34 0.48

135 130 125

27 44 60

“A” --- HARD & SOLID SOILS“B” --- SOILS LIKELY TO CRACK OR CRUMBLE“C” --- SOFT, SANDY, FILLED OR LOOSE SOILS

Shoring System Design Design criteriaDesign criteria

Soil classificationSoil classification Never consider soil better that Class-B for rescueNever consider soil better that Class-B for rescue

Trench dimensionsTrench dimensions EquipmentEquipment

Design specificationsDesign specifications OSHA chartsOSHA charts

Timber shoring chartsTimber shoring charts Hydraulic shoring chartsHydraulic shoring charts

Manufacturer’s tabulated dataManufacturer’s tabulated data Other tabulated dataOther tabulated data Custom engineeringCustom engineering