Comparison Krause 120731 520 cm vs Krause 120588 605 cm

— Stairs. The traditional, familiar design of two parallel bars, between which the steps are fixed. To work on such a ladder, additional support is required — for example, a wall.

— Transformer ladder. A staircase similar in structure to the one described above, only has several sections connected by a failing hinge. This solution allows you to direct sections at any angle and even adjust the ladder to a zigzag shape, not to mention turning it into a stepladder.

— Stepladder. Stairs that need to be laid out. In the working position, the two parts of the ladder converge at the top at an angle, forming a characteristic "hut". In this case, the steps can be located on one or both parts of the stairs. However, this design makes the model much heavier.

— Mini ladder. A reduced version of the above stepladders: such ladders have less than 4 steps on one section, including the footboard located at the top and, accordingly, a small height.

— Tour tower. A device in the form of a fairly large horizontal platform raised above the ground by vertical supports. A distinctive feature of the product is the presence of a wide and stable platform. Tour towers are indispensable for work that takes a lot of time, since you can stay on the platform for hours. They can have a collapsible sectional or non-collapsible one-piece design. The vast majority of mo...dels are equipped with a wheelbase, so that the ladder structure can be quickly and easily moved from place to place. Some modifications allow you to change the height of the supporting structures, which allows the stairs to be stably placed on steps or any other uneven surfaces, with a sharp difference in height.

— Staircase with platform. A special kind of stair structures, equipped with a fairly wide platform. Most often they are involved in a certain technological process, large warehouses and other premises where there is no need to fold and hide the stairs themselves. Platform ladders can be used for many tasks, such as loading/unloading, repair and construction operations, etc. Almost all products of this type are large in size, heavy and non-separable, which imposes certain restrictions on their transportation, storage and operation. .

— Attic stairs. Stairs, specially designed to provide access to the attic, are distinguished by their peculiar design. Such a ladder is attached from above (from the side of the attic) to the attic hatch and, when folded, does not protrude beyond its dimensions. Thus, while the entrance is closed, the staircase is hidden and the whole structure has a neat appearance; and when opened, the hatch tilts down and the ladder can be expanded into working condition. Note that the attic hatch and the box for its installation in the attic opening are usually included in the delivery of such a ladder.

In this paragraph, the main properties of the design of the stairs are given. Many models have several properties at once — for example, any sliding ladder will be at least attached, and transformer models combine attached, parted, and in some cases also sliding structures.

— One- way parting. A variety of ladders and mini-ladders (see "Type"), in which the steps are located on only one of the two components. Such models are lighter than double-sided spacers, but may be less convenient to use.

— Bilateral parting. This category includes options consisting of two parts, each of which has its own set of steps — in other words, from two separate stairs connected into one device. Unlike one-sided, a similar design is found in all types of stairs, and for transformers it is almost mandatory.

— Attached. Stairs that require additional support for installation in the working position — a wall, a fence, a tree, etc. Specifying an add-on structure in rack-and-platform models (see above) usually means that one or both legs can be used as a separate ladder. But in stepladders, this option is not found by definition.

— Sliding. Such models have at least one additional section (see "Number of sections"), which is able to extend partially or completely, thus increasing the length of the entire staircase. When a longe...r length is not required, this section (or sections) is located close to the main part of the stairs and has almost no effect on its dimensions. This design has gained wide popularity in models designed for high heights — after all, long stairs would be very inconvenient during transportation and storage if it were not for the possibility of folding.

— Hinged. Stairs in which several sections are interconnected by means of hinges. In two-section models, this does not give any fundamental differences from non-hinged fastening, but if there are three or more sections, additional possibilities for transforming the stairs may appear — the hinge allows you to rotate the sections in both directions relative to each other. At the same time, the transformation of such a structure into a working platform takes much less time than unfolding a rack with a platform (see "Type").

— Telescopic. A specific type of sliding stairs (see above). It differs in that the additional sections in the folded state are not located close to each other, but one inside the other (hence the name). Thanks to this, telescopic ladders take up a minimum of space and are very convenient to transport. On the other hand, they are quite expensive. This is due to both the overall complexity of the design and the fact that the inner sections must be thin (in order to fit inside the outer ones) and at the same time strong, which puts forward increased requirements for the strength of materials.

— Mobile. This feature means the presence of special devices that facilitate movement from place to place in the working position — for example, castors. It is found mainly among scaffolding (see "Type"): unlike more traditional ladders, carrying spread out scaffolding on weight is rather difficult, and folding into the stowed position and unfolding back takes a lot of time. In addition, wheels are found in some large and heavy ladders.

The number of sections — separate components with steps — in the design of the stairs. One section can only have traditional ladders without the possibility of unfolding and one-sided ladders (see "Type"); transformers (see ibid.), by definition, are equipped with at least two, and this is also the standard number for tower tours(a horizontal platform is not considered a section). Three sections can be used both in a sliding structure, and in a combination of a sliding and two-sided spaced (see "Design"). And in models for four sections, the parts of the stairs are usually interconnected in series and can be fixed at different angles to each other. This reduces the dimensions when folded and significantly expands the functionality: it becomes possible to turn the stairs, for example, into a working platform.

The total number of steps provided in the design of the stairs. This parameter is indicated rather for reference — the primary characteristic is still the height of the stairs. Note that when calculating the number of steps, the footboard is also taken into account (see below).

The maximum working height of the ladder. In models that do not have a footboard (see above), this parameter is usually indicated in the specifications for the total length of the stairs. It is worth noting here that the height of the upper step in such cases rarely corresponds to the working height to the nearest centimeter - firstly, the stairs are almost never strictly vertical, and secondly, the outermost steps are usually not on the very edge. However, in most cases this difference can be neglected. If the design provides for a footboard, then the height is measured along it.

When choosing a ladder by height, it should be taken into account that the longer the structure, the greater its weight and, usually, the higher the price. Therefore, buying a model with a long length makes sense only when there is a real need for it.

Ladder dimensions in fully folded position. The smaller they are, the more convenient the ladder will be in storage and transportation. Usually, only the length and width are indicated in the characteristics, because. the thickness of modern stairs is very small and in most cases it can be neglected; and in some models, only the length may be indicated at all — for the same reasons.

The maximum working height can be described as the highest height that can be reached using a given ladder. This parameter is determined as follows: the maximum height of the stairs is taken and the height of the person standing on it is added to it (or rather, the highest height that he can comfortably reach with his hands). Of course, this parameter is rather approximate, because taken into account for some average height; and in general the rules for counting will be different. So, for some manufacturers, to determine the maximum working height, they add 2 m to the height of the ladder, others — 2 m 10 cm, and if we are talking about a ladder (see "Design"), this increase can be even less — about 150 – 160 cm (in such models, the user rarely stands on the topmost crossbar). Nevertheless, this indicator makes it possible to estimate the height that you can reach, with an accuracy of a couple of tens of centimeters, which is most often quite enough.

The maximum height of a ladder when used in ladder mode. This parameter is specified only for models that are not originally ladders (see "Type"), but can be used in a similar format. Usually the height is given by the height of the highest rung in the "ladder" installation.

The total weight of the ladder. On the one hand, the lighter the model you choose, the more convenient it will be to carry, the less effort will be expended. On the other hand, lighter weight means less material used in the construction of the stairs, and this can adversely affect reliability. Therefore, it is worth choosing an option for this parameter depending on the planned features of the application. If the expected load on the ladder is significantly lower than the maximum, then you can not pay close attention to the weight. But if you have doubts and/or plan to work in difficult conditions with a heavy load, you should choose the more massive one from two models with the same characteristics. It is unlikely that this will seriously affect the cost of forces, but the risk of breakage and a dangerous fall will decrease significantly.