Four-link Portal Crane

A four link portal crane uses an articulated jib arrangement for quayside lifting. The linked geometry supports a near-horizontal load path during luffing, making level luffing portal cranes relevant to cargo transfers between vessels and the quay.

A crane proposal should match the cargo, required load at outreach and available berth space. For a TianLi four link portal crane inquiry, include the vessel dimensions, rail span, lifting height and hook or grab duties. Ask for the load chart and working envelope of the proposed configuration so that its rated capacity can be checked against the actual lifting cases.

Frequently Asked Questions

What is the purpose of the four link jib arrangement?
The linked jib geometry helps limit changes in load height as outreach changes. The achievable load path and operating range depend on the crane design.

Is lifting capacity identical at every outreach?
Use the load chart for the specific crane configuration. A general product description does not establish the permitted load at every radius.

Send your load cases and berth drawing to info@cranetl.com for a four link portal crane inquiry.

Related resources
Single Boom Portal Cranes · Grab Type Ship Unloaders
Port Equipment RFQ Checklist