70 ft span / 15 ton crane concept

Structure and operating principle

A crane design package labelled with a 70 ft span and 15 ton capacity; detailed configuration needs confirmation.

This entry is a design package for the lifting system and its structural interfaces. Runway reactions, support stiffness, clearances, connections and foundation loads require coordinated engineering; a drawing label is not a complete operating specification.

The retained label says 70 ft and 15 ton. Confirm the definition of “ton”, units, drawing revision and approved capacity before any conversion or purchasing decision.

Application and selection

For planning a new workshop lifting installation or reviewing a crane-and-steelwork interface. The building owner, structural designer and crane supplier must agree the design inputs and responsibilities.

Working method

1. Before work, authorised personnel confirm the load and its centre of gravity, the permitted machine configuration, the route and receiving position. Complete the checks specified for the equipment, verify protective functions by the approved method and stop if a defect affects safe operation.

2. Establish the load cases and duty, verify structural and equipment interfaces, complete installation and acceptance, then issue the machine-specific operating instructions. No general operating sequence should be inferred before the selected machine is defined.

3. After the task, place the load on stable supports and leave the equipment in its prescribed safe state. Record faults and abnormal events. Maintenance or jam clearance requires secure isolation of relevant energy, including stored hydraulic, pneumatic and gravitational energy.

Precautions and maintenance

Confirm units, geometry and revision status on approved drawings. Do not infer rated working capacity from steel member size or combine dimensions and ratings from separate projects; changes require recalculation and documented approval.

Inspection frequency, wear/discard criteria, lubrication, brake adjustment and replacement parts follow the supplied instructions and applicable local requirements. Only competent personnel may maintain the equipment; return to service follows the prescribed checks.

Configuration and standards

This is an equipment-selection and operating-principle overview, not a complete operator manual, lift plan or certificate. Verify rated load, duty, geometry, environment and protective functions against the nameplate, approved drawings and delivered instructions. Do not combine separate series maxima into one promised configuration.

Requirements follow the destination and installation, not the website language. China: determine the applicable GB/T references and statutory equipment obligations. EAEU destinations: check the applicable TR CU/EAEU regulations, amendments and conformity documents. English-speaking markets: select the relevant national rules; US OSHA and UK HSE references are not universal law. EU projects require their own applicable conformity assessment.