Bridge Cranes
Bohl Crane has manufactured cranes since 1926.
We are licensed, insured and authorized to build cranes by numerous crane component manufacturers.
We conform to our customers’ quality standards and we pride ourselves on following rigorous specifications such as:
- ASME
- CMAA
- MMA
- NEC
- NEMA
- AISC
- AWS
- OSHA
- ANSI
We combine our decades of experience with numerous products and designs to meet your needs.
Bohl Crane is confident that we can be cost-effective in our solutions and are not limited to the products of one manufacturer.
Crane Engineering
Our seven person engineering staff that has nearly 140 years of combined experience at Bohl! Our engineers provide fast response on:
- Initial design information such as loadings, clearances, heights and coverage
- Proposals
- Approvals
- Designs for Construction
- Changes to on-going projects
- Upgrades
Our Engineers are fully integrated with AutoCAD and routinely work with other programs.
About Our Bridge Cranes
Typical Applications
Standard crane such as a 5 ton crane for a fabrication shop or 30 ton crane for a steel service center.
Workstation cranes - such as a 1/8 ton crane handling automotive parts in a production operation.
Engineered cranes - such as a hot metal pouring cranes, magnet crane, die turning crane or automated pick and place crane.
Styles
Single girder or double girder bridges – advantage of single girder is lower price and the advantages of double girder are higher available capacity and increased hook height
Top running or under running - refers to whether the crane runs on top of fixed beams or rails or whether it runs on the bottom flange of a beam.
Under running is sometimes called underhung.Cranes can be designed to run on standard dual runways or three or more runways. Gantry Cranes – motorized, double leg or semi-gantry configurations
Construction
Top running are generally built from structural shapes such as WF beams, S beams or box girders while under running can be structural shapes or patented track.
Common patented tracks manufacturers are:
- Cleveland Tramrail
- Louden
- Spanmaster
- Trambeam
- TC American
Capacities and Spans
All capacities up to 100 tons or greater and
all spans up to 100 ft or greater
Duty Cycles
CMAA Class A,B,C,D,E,F
Enhancements or Accessories
Special close clearance designs to gain maximum hook height or maximum clearances
Cantilever bridge or trolley to allow hoist hook to reach more difficult locations
Variable speed control; inching controls; remote controls; cabs; below the hook devices, multiple hooks; rotating trolleys, special trolleys for manipulator arms and grabs.
Runways
Typically constructed of steel "runway" beams plus steel support system, inside or outside a building.
Top running cranes typically run on a rail section that is fastened to the top of the runway beam.
Common fastening method can be j-bolts, welded or bolted clips
Special engineered fastening systems may include a cushioning material between the rail and the steel runway beam for heavy duty or special applications.
Support system consists of columns or support brackets from existing columns.
Runways have assorted bracing techniques either to the building or to floor level.
Support columns may rest on the concrete floor or foundations.
May require unique designs to fit into challenging locations and/or support other loads.
Runways are often included by building supplier as part of new building steel framework.