Abstract: A length-adjustable ladder functioning as a telescopic lean-to ladder, a free-standing stepladder, and as a platform is described. The ladder includes stringers, ladder rungs fastened between the stringers, and supports connected to the stringers. The supports can be length-adjusted in a stepless manner. The supports can be swung in and arrested on the outer longitudinal sides of the stringers. A floor board assembly formed of two panel halves corresponding to a length of the ladder and has hinges is disposed on the two panel halves. The two panel halves each have a longitudinal side fastened, in an articulated manner on the ladder rungs by the hinges. Arresting elements are provided. Each of the arresting elements run through one of the two panel halves. The two panel halves are movable into a swung-up panel position wherein the two panel halves are arrested by the arresting elements.

Abstract: A length-adjustable ladder functioning as a telescopic lean-to ladder, a free-standing stepladder, and as a platform is described. The ladder includes stringers, ladder rungs fastened between the stringers, and supports connected to the stringers. The supports can be length-adjusted in a stepless manner. The supports can be swung in and arrested on the outer longitudinal sides of the stringers. A floor board assembly formed of two panel halves corresponding to a length of the ladder and has hinges is disposed on the two panel halves. The two panel halves each have a longitudinal side fastened, in an articulated manner on the ladder rungs by the hinges. Arresting elements are provided. Each of the arresting elements run through one of the two panel halves. The two panel halves are movable into a swung-up panel position wherein the two panel halves are arrested by the arresting elements.

Abstract: In the lower area of a ladder two pull or pressure rods are arranged on either side in a pivoting manner. Via sliding sleeves and joints said rods are joined to telescopic support elements which are each arranged at the level of an upright of the ladder. For greater stability the telescopic support elements are connected to each other via an auxiliary bar whose length can also be adjusted.

Abstract: In the lower area of a ladder two pull or pressure rods are arranged on either side in a pivoting manner. Via sliding sleeves and joints said rods are joined to telescopic support elements which are each arranged at the level of an upright of the ladder. For greater stability the telescopic support elements are connected to each other via an auxiliary bar whose length can also be adjusted.

Abstract: During blasting work, large quantities of blasting material (granules, glass, beads, slag and sand) together with residues of blasted color coating are projected over a large area after impact with the surface being blasted. This results in the pollution of large areas of the surrounding environment. The large quantities of dust produced cause problems for the population over a much wider area. The novel suction device prevents blasting material, dust and liquids from escaping from the blasting site and the area immediately surrounding the blast nozzle into the environment during blasting work. A second suction system which functions separately allows the device, with its integrated blast pressure nozzle, to hold itself steady automatically, even in extreme working positions, such as overhead, hereby relieving the operator of this task, and can still be moved laterally in any direction.

Abstract: A ladder support, in particular for corners of buildings, includes an angle bracket fitted directly or indirectly to the top end of a ladder by support arms of variable length. The angle bracket has spacers. Rollers are placed individually or in pairs at the free ends of the spacers. The rollers are variable in length and articulation. The support arms are each connected to the side rail of the ladder by a detachable clamping device. The angle bracket can be attached to a bearing bar, with the bearing bar attached to the support arms.

Abstract: A multi-purpose scaffold includes rail parts disposed adjacent one another and displaceable relative to one another, displaceable and adjustable steps disposed therebetween, fold-out splayed supporting poles connected to the rail parts, a connecting rod connected to the supporting poles for securing the supporting poles, and a locking device for releasably locking the two rail parts. The support and connection bars can be adjustably telescopic and folded parallel to the multipurpose support beams or rail parts. The support bars can have footboards or caster rollers. The walking surface is made from a line of steps that provide a flat surface when folded. One side of the steps is rotatably connected to one rail part and the other side of the steps is rotatably connected to the other rail part. The scaffold can include a climb-through aperture and one or more railings as an anti-falling safety device. The scaffold can include an extension section for connecting one scaffold to another scaffold.