What are the standard requirements for placing sleepers under a crane?
2 Answers
There are no specific standard requirements for placing sleepers under a crane. Generally, locally available materials are used as long as they are hard enough and not easily crushed. Below is relevant information: Purpose of outrigger pads: Mainly used to support the outriggers of construction machinery. The selected materials must have high strength and stiffness to minimize deformation under force, providing more stable support for the machinery. Advantages: Waterproof, does not expand or deform under sunlight. High impact resistance. Bends but does not break under overload. Non-stick, easy to clean. Resistant to chemicals and corrosion. Can withstand high and low temperatures. Easy to operate and requires no maintenance. Classification: Sleepers can be categorized by use into ordinary sleepers, switch sleepers, and bridge sleepers.
As someone who frequently assists at construction sites, I deeply understand the importance of adhering to crane outrigger pad specifications. The pads should be made of hardwood like oak or engineered timber, with a minimum thickness of 20 cm, free from cracks or moisture. The length must exceed the crane outrigger width by at least 30 cm to ensure even pressure distribution. When placing them, the ground must be level and firm—avoid operating on soft soil to prevent sinking or tilting. I always double-check level positioning and use anti-slip rubber mats to prevent hazardous shifting. I recall a coworker once cutting corners with thin wood, nearly causing a crane tip-over where falling cargo endangered lives. National standard GB/T 3811 details requirements including load calculations and regular replacement—these norms are non-negotiable in construction; never compromise safety to save time or effort.
