TYPES OF LADDER PDF



Types Of Ladder Pdf

Ladder Wikipedia. LADDER TYPES MODEL : SL.6000 POSITIONABLE LADDERS. LEAN IT : Positionable Ladders simply lean against a wall, cabinet or bookcase and require no rail or roller mechanisms.These ladders can be stored remotely from where they are used (like in a closet somewhere) and are …, ladder diagram and the program instructions for that ladder. 12.2.3 On-Off Cycle Timer Figure 12.8 shows how on-delay timers can be used to produce an on-off cycle timer. The timer is designed to switch on an output for 5 s, then off for 5 s, then on for 5 s, then off for 5 s, and so on. When there is an input to In 1 and its contacts close, timer.

Ladder Types — Better Sliding Ladders

QUICK CAR D Home Occupational Safety and Health. Our goals are very simple: We want to help you better understand how to choose the right ladder for the job and learn how to use ladders more safely. Four key elements of ladder selection are: Height, Performance, Materials, and Unique Product Solutions., whether a self-supporting ladder can sustain a certain load, apply the load to the ladder in a downward vertical direction with the ladder placed at a horizontal angle of 75.5 degrees. When portable ladders are used for access to Specific Types of Ladders.

British and European Ladder Certification Standards. All ladders manufactured and supplied within the United Kingdom and the European Union should be manufactured to specified standards and correctly classified. These requirements apply to all portable ladder types and include step ladders, platform steps and extension ladders. Specialist 50 bp DNA Ladder 3.0 % Agarose 100 bp DNA Ladder 2.4 % Agarose 200 bp DNA Ladder 1.8 % Agarose 500 bp DNA Ladder 1.2 % Agarose 1 kb DNA Ladder 0.6 % Agarose 20 bp DNA Ladder 3.6 % Agarose Linear Scale DNA Ladders show virtually uniform spacing over a large fragment size range. Long Range DNA Ladder 1.0 % Agarose Low Range DNA Ladder 3.0 %

Portable platform ladder. Different types of ladder. Extension ladder Straight ladder Platform ladder with castors Stepladder. 3. Guide to Ladders and Elevated W orking Platforms. X. Note the following points in each of the safety hints: 1. Application Types of Ladders Two types of portable ladders: •Step ladders (A-Frame) - Used mainly for tasks closer to the ground. •Straight or extension ladders - Used to access high, tight areas where it’s only possible to get two ladder feet on solid, level ground.

Ladder cable tray is used for about 75 percent of the cable tray wiring system installations. It is the predominate cable tray type due to its many desirable features: A ladder cable tray without covers permits the maximum free flow of air across the cables. This allows the heat LADDER USE IN CONSTRUCTION GUIDELINE PROVINCIAL LABOUR-MANAGEMENT HEALTH & SAFETY COMMITTEE health and safety of the worker. The employer’s decision to choose a ladder to work above or below grade must not be solely made on the basis of speed or ease of production. The primary consideration must be how to provide the

ladder diagram and the program instructions for that ladder. 12.2.3 On-Off Cycle Timer Figure 12.8 shows how on-delay timers can be used to produce an on-off cycle timer. The timer is designed to switch on an output for 5 s, then off for 5 s, then on for 5 s, then off for 5 s, and so on. When there is an input to In 1 and its contacts close, timer whether a self-supporting ladder can sustain a certain load, apply the load to the ladder in a downward vertical direction with the ladder placed at a horizontal angle of 75.5 degrees. When portable ladders are used for access to Specific Types of Ladders

Ladder diagrams are specialized schematics commonly used to document industrial control logic systems. They are called "ladder" diagrams because they resemble a ladder, with two vertical rails (supply power) and as many "rungs" (horizontal lines) as there are control circuits to represent. If we wanted to draw a simple ladder diagram showing a Ladder Logic Program Runs Output Image (PLC Memory) State of Actual Output Device As the ladder logic program is scanned, it reads the input data table then writes to a portion of PLC memory - the output data, table as it executes The output data table is copied to the actual output devices after the ladder logic has been scanned.

Types of Ladders There are many types of ladders and it is important to choose the right ladder for the task. Here are some different types: Extension/straight Fixed access Tripod orchard (orchard use only – never use indoors or for smooth surface application) Stepladder Extension/Straight Ladders Types of Ladders There are many types of ladders and it is important to choose the right ladder for the task. Here are some different types: Extension/straight Fixed access Tripod orchard (orchard use only – never use indoors or for smooth surface application) Stepladder Extension/Straight Ladders

A ladder is a vertical or inclined set of rungs or steps.There are two types: rigid ladders that are self-supporting or that may be leaned against a vertical surface such as a wall, and rollable ladders, such as those made of rope or aluminium, that may be hung from the top.The vertical members of a rigid ladder are called stringers or rails (US) or stiles (UK). Types of Ladders Two types of portable ladders: •Step ladders (A-Frame) - Used mainly for tasks closer to the ground. •Straight or extension ladders - Used to access high, tight areas where it’s only possible to get two ladder feet on solid, level ground.

ladder Safety

types of ladder pdf

Types of Ladders used in Construction. Types of Ladders Two types of portable ladders: •Step ladders (A-Frame) - Used mainly for tasks closer to the ground. •Straight or extension ladders - Used to access high, tight areas where it’s only possible to get two ladder feet on solid, level ground., Ladders. Velocity Ladder - Type 1A - Download Manual Revolution Ladder - Type 1A - Download Manual Quantum Ladder - Type 1A - Download Manual King Kombo Articulating Fiberglass Stepladder - Types 1AA - Download Manual Super Duty Ladder - Type 1AA - Download Manual Select Step Ladder - Type 1A - Download Manual Skyscraper Ladder - Type 1A - Download Manual.

types of ladder pdf

Unstained and fluorescent DNA Ladders. Ladders. Velocity Ladder - Type 1A - Download Manual Revolution Ladder - Type 1A - Download Manual Quantum Ladder - Type 1A - Download Manual King Kombo Articulating Fiberglass Stepladder - Types 1AA - Download Manual Super Duty Ladder - Type 1AA - Download Manual Select Step Ladder - Type 1A - Download Manual Skyscraper Ladder - Type 1A - Download Manual, Portable platform ladder. Different types of ladder. Extension ladder Straight ladder Platform ladder with castors Stepladder. 3. Guide to Ladders and Elevated W orking Platforms. X. Note the following points in each of the safety hints: 1. Application.

non-self-supporting ladders

types of ladder pdf

Stairway and Ladder Safety Types of Ladders - OSHAcademy. LADDER TYPES MODEL : SL.6000 POSITIONABLE LADDERS. LEAN IT : Positionable Ladders simply lean against a wall, cabinet or bookcase and require no rail or roller mechanisms.These ladders can be stored remotely from where they are used (like in a closet somewhere) and are … https://en.m.wikipedia.org/wiki/Cable_tray 50 bp DNA Ladder 3.0 % Agarose 100 bp DNA Ladder 2.4 % Agarose 200 bp DNA Ladder 1.8 % Agarose 500 bp DNA Ladder 1.2 % Agarose 1 kb DNA Ladder 0.6 % Agarose 20 bp DNA Ladder 3.6 % Agarose Linear Scale DNA Ladders show virtually uniform spacing over a large fragment size range. Long Range DNA Ladder 1.0 % Agarose Low Range DNA Ladder 3.0 %.

types of ladder pdf

  • OSHA Publication 3124 Stairways and Ladders
  • S LARS US N CNSRUCN Site Safe
  • Unstained and fluorescent DNA Ladders

  • 6/27/2015 · Learn from PLC Programming Examples. Another reason to make use of ladder logic examples is, that you can learn from them. Let’s say you have a specific functionality, you want to implement in your ladder logic, a PLC timer function for example. The first thing you naturally would do, is to think about it for yourself. fixed ladder - A ladder that cannot be readily moved or carried because it is an integral part of a building or structure. handrail - A rail used to provide employees with a handhold for support. job-made ladder - A ladder that is fabricated by employees, typically at the construction site; noncommercially manufactured.

    Where a ladder is used to gain access to a working platform ensure that it extends 1 metre above the working platform. Ladders should be set up at an angle of 1 horizontal (out) to 4 vertical (up) Do not carry tools and materials when climbing a ladder, maintain at least 3 … Ladder Logic Program Runs Output Image (PLC Memory) State of Actual Output Device As the ladder logic program is scanned, it reads the input data table then writes to a portion of PLC memory - the output data, table as it executes The output data table is copied to the actual output devices after the ladder logic has been scanned.

    Portable platform ladder. Different types of ladder. Extension ladder Straight ladder Platform ladder with castors Stepladder. 3. Guide to Ladders and Elevated W orking Platforms. X. Note the following points in each of the safety hints: 1. Application Types of Ladders. The very first thing you must decide before actually using a ladder is which type of ladder will work the best for the job at hand. Understanding the different types of ladders and their functions will allow you to make an informed decision and you will then be able to complete your task more efficiently and safely.

    Advanced ladder logic functions allow controllers to perform calculations, make decisions and do other complex tasks. Timers and counters are examples of ladder logic functions. They are more complex than basic inputs contacts and output coils and rely heavily upon data stored in the memoryof the PLC. The memory of a PLC is organized bytypes. controller"), and ladder processing is handled by the CPU. Communication between the two sections is made using bits of memory. Since the analog processing and ladder processing can be completely separated and the program is more simple than a ladder only program, the engineering process to construct the system is facilitated.

    Ladder cable tray is used for about 75 percent of the cable tray wiring system installations. It is the predominate cable tray type due to its many desirable features: A ladder cable tray without covers permits the maximum free flow of air across the cables. This allows the heat Introduction to Programmable Logic Controllers (PLC's) Industrial Control Systems Fall 2006. Lecture – Introduction to PLC's MME 486 – Fall 2006 2 of 47 entered in relay ladder logic form. • The processor accepts input data from various sensing devices, executes the stored user program, and sends

    50 bp DNA Ladder 3.0 % Agarose 100 bp DNA Ladder 2.4 % Agarose 200 bp DNA Ladder 1.8 % Agarose 500 bp DNA Ladder 1.2 % Agarose 1 kb DNA Ladder 0.6 % Agarose 20 bp DNA Ladder 3.6 % Agarose Linear Scale DNA Ladders show virtually uniform spacing over a large fragment size range. Long Range DNA Ladder 1.0 % Agarose Low Range DNA Ladder 3.0 % Our goals are very simple: We want to help you better understand how to choose the right ladder for the job and learn how to use ladders more safely. Four key elements of ladder selection are: Height, Performance, Materials, and Unique Product Solutions.

    types of ladder pdf

    Portable platform ladder. Different types of ladder. Extension ladder Straight ladder Platform ladder with castors Stepladder. 3. Guide to Ladders and Elevated W orking Platforms. X. Note the following points in each of the safety hints: 1. Application Advanced ladder logic functions allow controllers to perform calculations, make decisions and do other complex tasks. Timers and counters are examples of ladder logic functions. They are more complex than basic inputs contacts and output coils and rely heavily upon data stored in the memoryof the PLC. The memory of a PLC is organized bytypes.

    Ladder Wikipedia

    types of ladder pdf

    Portable Ladder Safety IN.gov. Advanced ladder logic functions allow controllers to perform calculations, make decisions and do other complex tasks. Timers and counters are examples of ladder logic functions. They are more complex than basic inputs contacts and output coils and rely heavily upon data stored in the memoryof the PLC. The memory of a PLC is organized bytypes., Ladder diagrams are specialized schematics commonly used to document industrial control logic systems. They are called "ladder" diagrams because they resemble a ladder, with two vertical rails (supply power) and as many "rungs" (horizontal lines) as there are control circuits to represent. If we wanted to draw a simple ladder diagram showing a.

    Cable support solutions Cooper Industries

    QUICK CAR D Home Occupational Safety and Health. Introduction to Programmable Logic Controllers (PLC's) Industrial Control Systems Fall 2006. Lecture – Introduction to PLC's MME 486 – Fall 2006 2 of 47 entered in relay ladder logic form. • The processor accepts input data from various sensing devices, executes the stored user program, and sends, Where a ladder is used to gain access to a working platform ensure that it extends 1 metre above the working platform. Ladders should be set up at an angle of 1 horizontal (out) to 4 vertical (up) Do not carry tools and materials when climbing a ladder, maintain at least 3 ….

    Ladder cable tray is used for about 75 percent of the cable tray wiring system installations. It is the predominate cable tray type due to its many desirable features: A ladder cable tray without covers permits the maximum free flow of air across the cables. This allows the heat Ladder or "Catwalk" Figure 20-1: Types of Portable Ladders Self-Supporting Ladders A stepladder is defined as a self-supporting portable ladder that is not adjustable in length, has flat steps and a hinged back, and whose back section is either a single ladder or …

    A ladder is a ladder is a ladder . . . right? Actually, nothing could be farther from the truth, especially when it comes to portable ladders. There are two primary categories of portable ladders on the market, and each category is comprised of two or more specific types of ladders. Portable ladders are Ladders. Velocity Ladder - Type 1A - Download Manual Revolution Ladder - Type 1A - Download Manual Quantum Ladder - Type 1A - Download Manual King Kombo Articulating Fiberglass Stepladder - Types 1AA - Download Manual Super Duty Ladder - Type 1AA - Download Manual Select Step Ladder - Type 1A - Download Manual Skyscraper Ladder - Type 1A - Download Manual

    Ladder diagrams are specialized schematics commonly used to document industrial control logic systems. They are called "ladder" diagrams because they resemble a ladder, with two vertical rails (supply power) and as many "rungs" (horizontal lines) as there are control circuits to represent. If we wanted to draw a simple ladder diagram showing a Types of Ladders. Some ladders may only elevate the user a few feet from the ground (), while others provide access to a third story roof (Extension Ladder).Then there are the modern combination ladders, which can provide everything from scaffolding to painting support.It is all a …

    Our goals are very simple: We want to help you better understand how to choose the right ladder for the job and learn how to use ladders more safely. Four key elements of ladder selection are: Height, Performance, Materials, and Unique Product Solutions. The Extension Trestle Ladder is a self-supporting portable ladder that is adjustable in length, consisting of a Trestle Ladder base and a vertically adjustable Extension section with a means for locking the ladders together. These ladders are often used in pairs to support a scaffold plank.

    6 Cable Ladder and Cable Tray Systems– Including Channel support Systems and other Associated Supports Definitions and Abbreviations Accessory Component used for a supplementary function e.g. to join two components together, clamp or fix to walls, ceilings or other supports, covers and cable retainers Associated supports Bespoke supports for cable tray and cable ladder other than BS 6946 channel Upon completion of Basics of PLCs you should be able to: • Identify the major components of a PLC and describe their functions • Convert numbers from decimal to binary, BCD, and hexadecimal • Identify typical discrete and analog inputs and outputs • Read a basic ladder logic diagram and statement list

    Ladder or "Catwalk" Figure 20-1: Types of Portable Ladders Self-Supporting Ladders A stepladder is defined as a self-supporting portable ladder that is not adjustable in length, has flat steps and a hinged back, and whose back section is either a single ladder or … Our goals are very simple: We want to help you better understand how to choose the right ladder for the job and learn how to use ladders more safely. Four key elements of ladder selection are: Height, Performance, Materials, and Unique Product Solutions.

    6 Cable Ladder and Cable Tray Systems– Including Channel support Systems and other Associated Supports Definitions and Abbreviations Accessory Component used for a supplementary function e.g. to join two components together, clamp or fix to walls, ceilings or other supports, covers and cable retainers Associated supports Bespoke supports for cable tray and cable ladder other than BS 6946 channel A ladder is a vertical or inclined set of rungs or steps.There are two types: rigid ladders that are self-supporting or that may be leaned against a vertical surface such as a wall, and rollable ladders, such as those made of rope or aluminium, that may be hung from the top.The vertical members of a rigid ladder are called stringers or rails (US) or stiles (UK).

    • Types of DAC Circuits – Resistor-string DAC – N-Bit Binary weighted DAC – R-2R Ladder DAC • Specifications of DAC • Applications. 2 What is a DAC? • Digital-to-Analog Converter: An electronic device, often an integrated circuit, that converts a digital number into a Types of Ladders. Some ladders may only elevate the user a few feet from the ground (), while others provide access to a third story roof (Extension Ladder).Then there are the modern combination ladders, which can provide everything from scaffolding to painting support.It is all a …

    6 Cable Ladder and Cable Tray Systems– Including Channel support Systems and other Associated Supports Definitions and Abbreviations Accessory Component used for a supplementary function e.g. to join two components together, clamp or fix to walls, ceilings or other supports, covers and cable retainers Associated supports Bespoke supports for cable tray and cable ladder other than BS 6946 channel Portable platform ladder. Different types of ladder. Extension ladder Straight ladder Platform ladder with castors Stepladder. 3. Guide to Ladders and Elevated W orking Platforms. X. Note the following points in each of the safety hints: 1. Application

    Stairway and Ladder Safety Types of Ladders - OSHAcademy. Portable platform ladder. Different types of ladder. Extension ladder Straight ladder Platform ladder with castors Stepladder. 3. Guide to Ladders and Elevated W orking Platforms. X. Note the following points in each of the safety hints: 1. Application, 50 bp DNA Ladder 3.0 % Agarose 100 bp DNA Ladder 2.4 % Agarose 200 bp DNA Ladder 1.8 % Agarose 500 bp DNA Ladder 1.2 % Agarose 1 kb DNA Ladder 0.6 % Agarose 20 bp DNA Ladder 3.6 % Agarose Linear Scale DNA Ladders show virtually uniform spacing over a large fragment size range. Long Range DNA Ladder 1.0 % Agarose Low Range DNA Ladder 3.0 %.

    Type of Cable Tray

    types of ladder pdf

    Types of Ladders used in Construction. The Extension Trestle Ladder is a self-supporting portable ladder that is adjustable in length, consisting of a Trestle Ladder base and a vertically adjustable Extension section with a means for locking the ladders together. These ladders are often used in pairs to support a scaffold plank., • Types of DAC Circuits – Resistor-string DAC – N-Bit Binary weighted DAC – R-2R Ladder DAC • Specifications of DAC • Applications. 2 What is a DAC? • Digital-to-Analog Converter: An electronic device, often an integrated circuit, that converts a digital number into a.

    ladder Safety. fixed ladder - A ladder that cannot be readily moved or carried because it is an integral part of a building or structure. handrail - A rail used to provide employees with a handhold for support. job-made ladder - A ladder that is fabricated by employees, typically at the construction site; noncommercially manufactured., Advanced ladder logic functions allow controllers to perform calculations, make decisions and do other complex tasks. Timers and counters are examples of ladder logic functions. They are more complex than basic input contacts and output coils and they rely upon data stored in the memory of the PLC. The memory of the PLC is organized to hold.

    ladder Safety

    types of ladder pdf

    British and European Ladder Certification Standards. Where a ladder is used to gain access to a working platform ensure that it extends 1 metre above the working platform. Ladders should be set up at an angle of 1 horizontal (out) to 4 vertical (up) Do not carry tools and materials when climbing a ladder, maintain at least 3 … https://vls.wikipedia.org/wiki/Typische_West-Vlamsche_woordn ladder will be level and stable, and where it is reasonably practicable to do so, the ladder can be secured. Safe use of ladders and stepladders A brief guide This is a web-friendly version of leaflet INDG455, published 01/14 Ladders and stepladders are not banned under health and safety law..

    types of ladder pdf

  • Stairway and Ladder Safety Types of Ladders - OSHAcademy
  • Product Manuals LittleGiantLadder.com
  • Ladder Use in Construction Guideline

  • Ladder or "Catwalk" Figure 20-1: Types of Portable Ladders Self-Supporting Ladders A stepladder is defined as a self-supporting portable ladder that is not adjustable in length, has flat steps and a hinged back, and whose back section is either a single ladder or … fixed ladder - A ladder that cannot be readily moved or carried because it is an integral part of a building or structure. handrail - A rail used to provide employees with a handhold for support. job-made ladder - A ladder that is fabricated by employees, typically at the construction site; noncommercially manufactured.

    Ladder Logic Program Runs Output Image (PLC Memory) State of Actual Output Device As the ladder logic program is scanned, it reads the input data table then writes to a portion of PLC memory - the output data, table as it executes The output data table is copied to the actual output devices after the ladder logic has been scanned. Chapter 5 · Basic Ladders Ground Ladder Safety Standards for Members WAC 296-305-06005 This section establishes the minimum requirements for the construction, care and use of the common types of ladders used in fire operations. (1) Ladder locks or pawls on extension ladders shall be so fastened or

    The ladder you select must be the right size for the job. The Duty Rating of the ladder must be greater than the total weight of the climber,tools,supplies,and other objects placed upon the ladder. The length of the ladder must be sufficient so that the climber does not have to stand on the top rung or step. Advanced ladder logic functions allow controllers to perform calculations, make decisions and do other complex tasks. Timers and counters are examples of ladder logic functions. They are more complex than basic inputs contacts and output coils and rely heavily upon data stored in the memoryof the PLC. The memory of a PLC is organized bytypes.

    LADDER TYPES MODEL : SL.6000 POSITIONABLE LADDERS. LEAN IT : Positionable Ladders simply lean against a wall, cabinet or bookcase and require no rail or roller mechanisms.These ladders can be stored remotely from where they are used (like in a closet somewhere) and are … The ladder you select must be the right size for the job. The Duty Rating of the ladder must be greater than the total weight of the climber,tools,supplies,and other objects placed upon the ladder. The length of the ladder must be sufficient so that the climber does not have to stand on the top rung or step.

    controller"), and ladder processing is handled by the CPU. Communication between the two sections is made using bits of memory. Since the analog processing and ladder processing can be completely separated and the program is more simple than a ladder only program, the engineering process to construct the system is facilitated. An Articulated Ladder is a portable ladder with one or more pairs of locking hinges which allow the ladder to be set up in several configurations such as a single or extension ladder, with or without a stand-off, a stepladder, a trestle ladder, scaffold or work table.

    Ladder diagrams are specialized schematics commonly used to document industrial control logic systems. They are called "ladder" diagrams because they resemble a ladder, with two vertical rails (supply power) and as many "rungs" (horizontal lines) as there are control circuits to represent. If we wanted to draw a simple ladder diagram showing a Introduction to Programmable Logic Controllers (PLC's) Industrial Control Systems Fall 2006. Lecture – Introduction to PLC's MME 486 – Fall 2006 2 of 47 entered in relay ladder logic form. • The processor accepts input data from various sensing devices, executes the stored user program, and sends

    ladder will be level and stable, and where it is reasonably practicable to do so, the ladder can be secured. Safe use of ladders and stepladders A brief guide This is a web-friendly version of leaflet INDG455, published 01/14 Ladders and stepladders are not banned under health and safety law. Ladder cable tray is used for about 75 percent of the cable tray wiring system installations. It is the predominate cable tray type due to its many desirable features: A ladder cable tray without covers permits the maximum free flow of air across the cables. This allows the heat

    6/27/2015 · Learn from PLC Programming Examples. Another reason to make use of ladder logic examples is, that you can learn from them. Let’s say you have a specific functionality, you want to implement in your ladder logic, a PLC timer function for example. The first thing you naturally would do, is to think about it for yourself. 6 Cable Ladder and Cable Tray Systems– Including Channel support Systems and other Associated Supports Definitions and Abbreviations Accessory Component used for a supplementary function e.g. to join two components together, clamp or fix to walls, ceilings or other supports, covers and cable retainers Associated supports Bespoke supports for cable tray and cable ladder other than BS 6946 channel

    Where a ladder is used to gain access to a working platform ensure that it extends 1 metre above the working platform. Ladders should be set up at an angle of 1 horizontal (out) to 4 vertical (up) Do not carry tools and materials when climbing a ladder, maintain at least 3 … A ladder is a vertical or inclined set of rungs or steps.There are two types: rigid ladders that are self-supporting or that may be leaned against a vertical surface such as a wall, and rollable ladders, such as those made of rope or aluminium, that may be hung from the top.The vertical members of a rigid ladder are called stringers or rails (US) or stiles (UK).

    ladder diagram and the program instructions for that ladder. 12.2.3 On-Off Cycle Timer Figure 12.8 shows how on-delay timers can be used to produce an on-off cycle timer. The timer is designed to switch on an output for 5 s, then off for 5 s, then on for 5 s, then off for 5 s, and so on. When there is an input to In 1 and its contacts close, timer Portable Ladder Safety . Portable Ladders • Consistently in top 10 OSHA standards •Types of portable ladders and hazards associated with them •Safe practices when using portable ladders . Portable ladder types • Step ladders • Extension ladders • Single or straight ladders . Step ladder Manufactured in heights up to 20 feet.

    STUD OF COMMON TYPES OF MECHANISMS FOR PORTABLE LADDER INCIDENTS 3 csagroup.org The focus of this paper is to summarize the results from a review … S LARS US N CNSRUCN Ladders used by construction and trade workers must be more robust than those used in the home. All ladders should comply with the relevant New Zealand standard and should be labelled accordingly. Specific sites may have rules in place about the use of ladders, check with the site management first.