Rail clamps “grip” the rail head/sides to secure the crane; top-of-rail brakes press friction surfaces onto the rail; wedge storm brakes use a wedge mechanism to generate high holding force and resist movement. Each has strengths. Rail clamps provide strong securing and are common in ports and heavy outdoor gantries. Top-of-rail brakes can be effective where rail surface and alignment are suitable. Wedge systems offer compact, high holding force but require correct installation and maintenance to prevent jamming or uneven loading.
In many high-wind installations, combining devices is the best practice: for example, travel brakes for normal operation plus rail clamps or wedge brakes for storm securing. Combination selection should be based on required holding force, rail condition, corrosion environment, and maintenance capacity.
Also consider operational workflow: how quickly must the crane be secured, whether automatic engagement is required, and what interlocks prevent travel while storm devices are applied. A complete wind-safety plan includes both hardware and procedures.