To most people, ladders may seem like a simple object with a basic intended use – you go up them, you come down them. But what many don’t realize is that nowadays, each ladder available on the market is specifically designed for a certain type of job or function.

For example, platform ladders are ideal for do-it-yourselfers as they feature a platform to rest tools and equipment on, whereas double sided step ladders are designed for construction or home work.

Step Ladders have been around in some from or other since the beginning of time.Before the 20 th century, ladders were mainly made of wood, but obvious problems came in the form of rotting and decay, as well as conductivity while wet. While wood is still used to construct various types of ladders such as attic and loft ladders, it is rarely used for ladders that are destined for outdoor work.

But modern innovation has make them evolve into highly practical tools for use around the home and also in industry.

Aluminum ladders became the next big thing to hit. These are extremely strong and weather-resistant and can take the hard workout that often comes with commercial use. But with these great benefits came two downsides – aluminum conducts electricity, making it unsuitable for electrical work, and it also buckles and becomes unusable after it has been exposed to heat.

Fiberglass ladders are the current darling of the ladder industry. They possess all the finest qualities in one product, making them ideal for most kinds of work. They don’t conduct electricity; are lightweight; and are sturdy.

 

 

 

 

From:http://www.ladder-supplier.com/news/index.html

A ladder is a vertical or inclined set of rungs or steps. There are two types: rigid ladders that can be leaned against a vertical surface such as a wall, and rope ladders that are hung from the top. The vertical members of a rigid ladder are called stringers (US) or stiles (UK). Rigid ladders are usually portable, but some types are permanently fixed to buildings.

Rigid ladders are available in many forms, such as:
Step ladder:one kind is hinged in the middle to form an inverted V, with stays to keep the two halves at a fixed angle,which is called double sided step ladder. And the other kind is the  vertical ladder, also called straight ladder. Another is household ladder ,it is like double sided step ladder.These aluminium ladder are the popular products of Zhongxin.

Extension ladder or Telescopic ladder, fixed ladder divided into two or more lengths for more convenient storage;

From:http://www.ladder-supplier.com/news/index.html

The full name of EN131 is "EN131 safety certification", which is a test for the safety of  household ladder in European.
EN131 has different testing requirements for various ladders.

Vertical ladder, extension ladders, Push up or rope operated extending ladders, 2 plans,
Double ladder,Combination ladder 2 or 3 plans, Simple telescopic ladder
EN131-1/2/3 + Decree 96-333
Articulated ladder
EN131-1/2/3/4 + Decree 96-333
EN131 testing include: structural design, surface treatment, folding bolt testing, open range, ladder step pitch test, treadmill test, non-slip test, expansion testing, stability testing, load-bearing test, detection of toxic materials, stickers, and audit of corresponding Annex detection.

Aluminum Step Ladder ZX301 and Working Platform ZX1004 of ladder supplier Zhongxin Machinery Co., Ltd have passed EN131 certification.

 

 

ZX301 aluminium ladder  of ladders suppliers Zhongxin Machinery Co., Ltd has passed EN131 safety certification.

Model No      ZX301
Material     Aluminum alloy
Step material     Aluminum alloy
Overall size     1460*890*510mm
Size of step     80*35mm
Number of step     4
Spacing between steps     300mm
Extend length     1460mm
Closenup length     1520mm
Max loading capacity     150KGS
Packing Size     1520*510*160mm
N.W     5.4KGS
Container QTY20’/40'     270/540
Ladder Manufacturer:Zhongxin Machinery Co., Ltd

Issues should be paid attention to when you use ladder:
1.check if the ladders(aluminum ladder) comply with the safe-use requirements
2.when the angle of ladder(not double sided step ladder)is about 60 degrees, you should not be working on the highest cross standing.
3.there better be width limit device for double sided step ladder,people are not suggested to riding work or on the top standing
4.there would be better to use seat belts when work in high place
5.People feel physical fatigue, use drugs,alcohol or have physical barriers should not use ladders (aluminium ladder )
6.Ladder should be placed on solid and smooth ground,should not on icy,snowy or slippery ground without fixed set.
7.Should not operation exceed the maximum loading capacity indicated by ladder manufacturers.

8.Should  not use ladder in strong winds
9.Aluminum step ladder is Conductive,so it should be used carefully in electric places
10.When climbing the ladder,people shoud grasp firmly and maintance  the body in the central of two ladder column.

From:http://ladder-supplier.com/news/index.html