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Western Safety Products, Inc. 505 South Lander St., Seattle, WA 98134
Toll Free: (888) 823-0808 Phone: (206) 264-0808 Fax: (206) 264-4921
Website: http://www.westernsafety.com sales@westernsafety.com

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Spanco Crane Page 5

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Jib Crane Basics

WHY A JIB CRANE?
Today's industry demands versatile, efficient, and cost effective equipment while al the same time providing more flexibility along with significant savings through increased productivity. A jib crane can help improve materials handling efficiency and work flow. Serious consideration should be given to jib cranes for applications requiring repetitive lifting and transferring of loads within a fixed arc of rotation.
HOW TO CHOOSE THE RIGHT CRANE
In selecting a jib crane to match your individual requirements and application, thought should be given to operation type, available structure, necessary options, and cost of both the unit and installation. The following factors should be considered in order to choose a jib crane for maximum effectiveness at minimum cost.

  • Capacity: The maximum weight of the application should match, not exceed, design weight. The capacity rating is based on a design load which includes the capacity rating of the crane plus 15 % of the capacity for the weight of the hoist and trolley, 25 % of the capacity as an allowance for impact. The deflection is based on a design load which includes capacity plus 15% of capacity for the hoist and trolley. The SPANCO design criteria allows the least amount of deflection so as not to hamper the performance of the crane.
  • Area of rotation: Free standing and mast type jib cranes offer 3600 rotation. Wall mounted types offer 2000 rotation.
  • Underboom height: Distance from the floor to the underside of the boom. The size of the hoist and the amow1t of lifting distance should also be considered.
  • Overall height: The height to the highest point on the crane after installation.

Any attachments, such as electrical entry, should also be considered to provide full rotational potential of the crane, and to be free of overhead obstructions.

  • Working span: Amount of actual working area needed. The working distance or hook distance is approximately one-half the trolley length from the end of the beam, and also is the same distance from the head assembly or vertical support member of the jib.
  • Power-motor requirement: How much power is necessary? Is the power for rotation, trolley, hoist, or all three? (standard powered jib rotation is approximately 1/2 r.p.m) How will the power be supplied? Bottom or top entry? Electric or air? Finally, does the system need to be weatherized or is it for indoor use?
  • Installation: Can the crane be assembled easily to reduce cost? The location will also dictate the type of crane to be selected to insure proper installation. Free standing jibs require reinforced concrete foundations which can cost more than the crane itself.

WARNING: This equipment is not, in any way, designed for lifting, supporting, or transporting humans. Failure to follow the specified load and mounting limitations can result in serious bodily injury and/or property damage.

Jib cranes are an economical solution for moving materials within an individual workstation, for transferring materials from work area to work area or for serving as auxiliary lifting devices under overhead cranes.
Styles range from entirely self-supporting to styles that mount to existing building columns, resulting in low costs compared to some overhead lifting systems. Because they are self-supporting, free standing lib cranes are well suited for outdoor use and can be fully weatherized.


Free Standing Jib Cranes

FREE STANDING JIB CRANES

  • 3600 rotation.
  • Allows for electrified, motor driven, powered rotation through various collector ring assemblies.
  • The boom or I-beam is designed to meet all specifications utilizing a 25% factor of rated load for impact and 15% of rated load for hoist and trolley weight.
  • The pipe mast or column is designed to give maximum strength and minimum deflection to resist bending, buckling, and crushing as well as wear by the trunnion roller assembly.
  • The top bearing assembly utilizes a Timken tapered roller bearing provided with a grease fitting for proper lubrication.
  • The bearings are designed for a 5000 hour, B-10 design life.

Head assembly

  • Constructed of standard plate, angles, and channels to ensure minimum deflection and maximum rigidity.
  • The plates are reinforced using angles to limit compression and buckling stresses.
  • The lower trunnion roller assembly is mounted on a channel which transfers the load from the top of the box.
  • The head assembly is designed to inhibit dislodgment due to upward and forward motion. It allows bottom entry electrification inside the head and will also allow mounting above the boom for top entry electrification.

Foundations

  • SPANCO free standing jib cranes are designed to be mounted to a permanent concrete foundation which, in addition to anchoring the crane, acts basically as a counterweight for the forces exerted by the crane under maximum loading conditions. The recommended foundations are based on a soil pressure of 2,500 lbs. per sq. ft., so it is possible
    in some cases to reduce the foundation size if it is determined to be feasible by a qualified architect
    or engineer.
  • It is solely the customer's responsibility to provide the proper foundation for the crane so there should be no deviation from the recommended foundation size without first consulting a qualified professional.

Free standing jib cranes are available in three basic styles to suit specific applications:

  • base plate mounted
  • foundation mounted, and
  • sleeve insert mounted.

360º rotational capability can maximize the utilization of any work area.
No additional support is needed other than the specified reinforced concrete foundation.

100 Series Base Plate Mounted Jib Cranes

Base Plate Mounted (100 Series)

  • Utilizes a hexagonal base plate reinforced with six knee braces equally spaced on the circumference of the mast.
  • The base plate assembly is secured by means of anchor bolts to a prescribed reinforced concrete foundation, with the number of anchor bolts varying with the capacity of the crane.
  • Six bolts are used for columns less than 16" in diameter and 12 bolts for columns 16" in diameter and greater.
Foundation Mounted Jib Crane

Foundation Mounted (101 Series)

  • Utilizes a square steel plate which is welded to the bottom of the column.
  • The plate positions and levels the mast by anchoring it to a first-pour concrete footing.
  • A second-pour foundation of reinforced concrete supports the mast. Makes complete use of the work floor area and can be used in applications where a base plate could hamper floor activity.
Sleeve Insert Mounted Jib Crane

Sleeve Insert Mounted (102 Series)

  • 360º rotation.
  • Utilizes a square steel plate which is welded to the bottom of the sleeve.
  • Allows for relocation of the mast.
  • The plate positions and levels the sleeve by anchoring it to a first-pour concrete footing.
  • A second-pour foundation of reinforced concrete supports the sleeve.
  • The mast is then placed into the sleeve where it is leveled by wedges and welded in place. 102 series can be relocated without damaging the mast. *
  • Makes complete use of the work floor area and can be used in applications where a base plate could hamper floor activity.

*New sleeve and foundation would be required.

CAPACITY TONS

SPAN

HEIGHT UNDER BOOM

MAST

BOOM

OVERALL HEIGHT

BOLT CIRCLE DIAMETER

1/2

10'

10'

12"

8"

10'-8"

30"

12'

10'

12"

8"

10'-8"

30"

14'

10'

12"

10"

10'-10"

30"

16'

10'

12"

10"

10'-10"

30"

18

10'

12"

12"

11'-0"

30"

20'

10'

14"

12"

11'-0"

36"

1

10'

10'

12"

10"

10'-10"

30"

12'

10'

14"

10"

10'-10"

36"

14'

10'

14"

12"

11'-0"

36"

16'

10'

14"

12"

11'-0"

36"

18

10'

14"

15"

11'-3"

36"

20'

10'

16"

15"

11'-3"

42"

2

10'

12'

14"

12"

13'-0"

36"

12'

12'

16"

12"

13'-0"

42"

14'

12'

16"

15"

13'-3"

42"

16'

12'

16"

18"

13'-6"

42"

18

12'

16"x

18"

13'-6"

42"

20'

12'

18"

18"

13'-6"

48"

3

10'

12'

16"

15"

13'-3"

42"

12'

12'

16"x

15"

13'-3"

42"

14'

12'

16"x

18"

13'-6"

42"

16'

12'

18"

20R

14'-6"

48"

18

12'

18"

20R

14'-6"

48"

20'

12'

24"

24R

14'-6"

60"

5

10'

12'

18"

18"

13'-8"

48"

12'

12'

20"

18"

13'-8"

54"

14'

12'

20"

20R

14'-6"

54"

16'

12'

24"

24R

14'-6"

60"

18

12'

24"

24R

14'-6"

60"

20'

12'

24"

25R

15'-0"

60"


Mast Jib Cranes

MAST JIB CRANES

  • SPANCO mast mounted jib cranes offer a lower cost alternative to free standing jib cranes.
  • Full 360° rotation, without requiring a large mounting foundation (which can cost more than the crane).
  • Requires top and bottom support of the mast to building floor and overhead building steel.
  • Power rotation is available on all models.

WARNING:
Jib cranes should not be hung from any existing building structure without first consulting a qualified architect or engineer for the purpose of determining if the structure is adequate. Severe bodily injury and property damnge can result if this procedure is not followed.

Full Cantilever Mast Jib Cranes

Full Cantilever (200 Series)

  • Utilizes an I-beam for the boom and an H-beam for the column.
  • Two types of bearing arrangements:
  • A self-aligning spherical bearing is used on the top bearing assembly.
  • A bronze bearing and bronze thrust washer are used on the bottom assembly.
  • Both bearing assemblies are provided with grease fittings to provide lubrication and to aid rotation.
  • The boom is mounted at the top of the mast in order to provide maximum underboom clearance.
Drop Cantilever Mast Jib Cranes

Drop Cantilever (201 Series)

  • Identical to the Series 200 with the addition of side-plate connections which allow the boom to be mounted permanently at any specified height on the mast.
  • Provides clearance for overhead obstructions above the boom, below the top of the mast.

CAPACITY TONS

SPAN

OVERALL HEIGHT

MAST

BOOM

1/2

10'

10'-0"

10"

8"

16'

10'-0"

14"

10"

20'

10'-0"

14"

12"

1

10'

10'-0"

14"

10"

16'

10'-0"

14"

12"

20'

10'-0"

16"

15"

2

10'

12'-0"

14"

12"

16'

12'-0"

18"

18"

20'

12'-0"

21"

20R

3

10'

12'-0"

16"

15"

16'

12'-0"

21"

20R

20'

12'-0"

21"

24R

5

10'

14'-0"

18"

18"

16'

14'-0"

24"

24R

20'

14'-0"

27"

24R

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