CRANE SIGNALS - Rigging book

TABLE 10 (Cont’d.)

er’s recommended crane capacity, as shown on the load charts for the conguration to be used.

• The load must be lifted by more than one crane.

• The lift requires deviation from the manufacturer’s recommendations, including but not limited to:

- Using a boom conguration unlike that on the boom makeup chart

• - Moving a crane with a longer boom than recom-mended

• - Exceeding the capacities or restrictions shown on the load chart

15.3.2 All critical lifts require a critical lift form be completed (see PH84 for form) and may require a close proximity permit.

16. RIGGING WITH FORKLIFTS

Forklifts are designed specically to avoid the need for co-worker assistance in front, to steady, engage, or attach loads. Any need for others to assist a forklift in handling or attaching a load greatly increases hazards.

16.1 Free rigging is the direct attachment to or place-ment of rigging equipplace-ment (slings, shackles, rings, etc.) onto the tines of a forklift for a below-the-tines lift. This type of lift does not use an approved lifting attachment and is not recommended.

16.2 Attachments (jibs, poles, etc.) must be securely attached to the tines or mast of the forklift.

16.3 Modications and the use of free rigging or attach-ments will affect the capacity and safe operation of the forklift. Written approval must be obtained from the manufacturer authorizing use and providing capacity.

16.4 Only stable or safely arranged loads should be handled. Caution shall be exercised when handling off-center loads.

16.5 Forklift rigging that involves the suspension of loads from forks or attachments effectively turns

• The lift requires deviation from the manufacturer’s recommendations, including but not limited to:

- Using a boom configuration unlike that on the boom makeup chart

- Moving a crane with a longer boom than recommended - Exceeding the capacities or restrictions shown on the load chart

15.3.2 All critical lifts require a critical lift form be completed (see PH84 for form) and may require a close proximity permit.

16. RIGGING WITH FORKLIFTS

Forklifts are designed specifically to avoid the need for co- worker assistance in front, to steady, engage, or attach loads. Any need for others to assist a forklift in handling or attaching a load greatly

increases exposure to hazards. The use of forklift attachments require specific skills that include, but not limited to, how to safely

connect and disconnect the attachment from the forklift, load capacity changes, load handling characteristics and dynamics, limitations of use and additional hazards the attachment creates. Prior to initial use, training is required for the operator and any assistant on each specific forklift/attachment combination.

16.1 Free rigging is the direct attachment to or placement of rigging equipment (slings, shackles, rings, etc.) onto the tines of a

forklift for a below-the-tines lift and does not use an approved lifting attachment. Free rigging ^{shall not} be used to support loads from a forklift.

16.2 Modifications to a forklift by the use of attachments will affect the capacity, stability and safe operation of the forklift. The use of any attachment must be approved in writing by the forklift manufacturer. The documentation shall include the capacity and weight of the attachment as well as the resulting net

capacity of the forklift. Consult DuMES for assistance in

situations where the forklift manufacturer’s approval to use a particular attachment can not be obtained.

16.3 Attachments (jibs, poles, etc.) must be securely attached to the tines or mast of the forklift.

16.4 Only stable or safely arranged loads should be handled.

Caution shall be exercised when handling off-center loads.

16.5 Forklift rigging that involves the suspension of loads from

attachments effectively turns the forklift into a crane, with all the additional requirements listed in Section 15 to be considered.

the forklift into a crane, with all the additional requirements as listed in Section 15 to be considered.

17. HANDY THINGS TO KNOW

TO FIND...

• The circumference of a circle, multiply the diam-eter by 3.1416 (approx. 3¹/ ⁷).

• The diameter of a circle, multiply the circumfer-ence by .31831.

• The area of a circle, multiply the square of the diameter by .7854.

• The area of a triangle, multiply the base by ¹/ ² the perpendicular height.

• The volume of a sphere, multiply cube of the diameter by .5236.

• A gallon of water weighs 8¹/ ² lbs.

• A gallon of water contains 231 cubic inches.

• A cubic foot of water contains 7¹/ ² gals., 1728 cubic inches and weighs 62¹/ 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.

18. WEIGHTS OF MATERIAL

APPROX. WEIGHT

MATERIAL PER CUBIC FOOT – LBS.

Brick (common) 120 (about 3 tons per 1000) Concrete 150 (4050 lbs. per cu. yd.) Crushed Rock 95 (2565 lbs. per cu. yd.) Lumber 32 (10 lbs./2” x 4” x 8’-0”)

Mortar 100

Sand 120 (3240 lbs. per cu. yd.)

Steel 490 (40.8 lbs./Sq. Ft. 1” thick)

Tar/Rooﬁng 63

Water 62.5 (8.3 lbs./Gal.)

SQUARE KNOT

A safe means of fastening together the ends of two ropes of the same diameter.

BOWLINE

A loop which will not slip or draw tight.

ROUND TURN & TWO HALF HITCHES

For fastening a scaffold line to a supporting beam.

RUNNING BOWLINE

19. SAFE HITCHES AND KNOTS

CLOVE HITCH

Step 1 Step 2

Remember, knots reduce the capacity of the rope by as much as 50%.

In document Rigging book (Page 47-53)