→ Stabilizing elements that transmit loads to foundation, offering the necessary resistance conditions.

→ It consists of horizontal bars that must withstand the bending stresses and vertical elements that must resist the compressive stresses.

→ Horizontal surface or platforms that must be supported by the main structure.

→ They transmit loads up to the foundation through the beams and pillars or main structure.

→ The access ladder to a silo consists of a vertical structure fixed to the main structure forming an angle of 90º with respect to the ground.

→ A protection cage should be integrated from a height of 2.50 from the ground level.

→ The safety cage is a perimeter protection structure formed by a set of rings arranged vertically along the ladder, above 2.50m to 1m above the arrival surface.

→ Ladders must comply with a rest platform every 9m of vertical section in order to ensure the rest in the ascent and descent of the ladder. 

→ Vertical distance between steps: ≤ 0.30m

→ Step width:  ≥ 0,40m y ≤ 0,8m

→ Minimum diameter of the cage at startup: 0,70m

→ Maximum diameter of the cage in the rest of the section: 0,60m

→ Maximum distance between rest platforms: 9m

→ Minimum surface of rest platforms: 0,60m x 0,95m

→ Maximum height of the cage to the ground: 2,50m

→ Minimum height of the cage on the arrival surface: 1m

Ladders and platforms must be protected against the risk of accidental fall, with the following elements:

RAILING:

→ It is the upper bar that must be located 90cm from the ground level, when the elevation height does not exceed 6m. When it exceeds, the protection should be set at 1.1m.

→ Its resistance must reach 150 kg per linear meter.

INTERMEDIATE LIST:

→ It is the bar that is located at an intermediate level between the base and the railing.

→ Its mission is a supplementary protection to prevent the fall.

SKIRTING-BOARDS:

→ Its mission is to prevent falling objects and possible slippage.