# Calculating Working Load Limit for Hoisting and Rigging

## Calculating Working Load Limit for Hoisting and Rigging

Millwrights must understand how to use calculations to locate the correct sizes used in lifting and for each piece of equipment used in the lift.

**Please note that some tasks within this task set are above a Level 3.**

- Attached document - Understanding Working Load Limits for Hoisting and Rigging
- Pen and paper
- Scientific Calculator

### A1. Read continuous text

Competency A: **Find and Use Information**

Task Group A1: **Read continuous text**

Level: **2**

At this level, learners: **Read texts to locate and connect ideas and information**

**Performance Descriptors**

The learner:

• Makes connections between sentences and between paragraphs in a single text

• Scans text to locate information

• Locates multiple pieces of information in simple texts

• Reads more complex texts to locate a single piece of information

• Makes low-level inferences

• Follows the main events of descriptive, narrative, and informational texts

• Obtains information from detailed reading

• Begins to identify sources and evaluate information

**Task Descriptors**

• Scope of task is clearly defined

• Involves one text

• Is one paragraph or longer

• May include unfamiliar elements (e.g. vocabulary, context, topic)

**Text types:**

instructional, descriptive, narrative, and informational texts

**Examples: **

- Letters
- Emails
- Notices

**ESKARGO:**

Embedded Skills, Knowledge and Attitudes Reference Guide for Ontario - A1.2

### A2. Interpret documents

Competency A: **Find and Use Information**

Task Group A2: **Interpret documents**

Level: **2**

At this level, learners: **Interpret simple documents to locate and connect information**

**Performance Descriptors**

The learner:

- Performs limited searches using one or two search criteria
- Extracts information from tables and forms
- Locates information in simple graphs and maps
- Uses layout to locate information
- Makes connections between parts of documents
- Makes low-level inferences
- Begins to identify sources and evaluate information

**Task Descriptors**

- Scope of task is clearly defined
- Involves one document
- Uses a simple format
- Displays a limited amount of information
- Is typically up to one page in length
- May include unfamiliar elements (e.g. vocabulary, context, topic)
- Documents at this level may contain a paragraph or more of text

**Examples:**

- Forms
- Tables
- Simple graphs
- Street maps
- Simple flow charts
- Floor plans

**ESKARGO:**

Embedded Skills, Knowledge and Attitudes Reference Guide for Ontario – A2.2

### C3. Use measures

Competency C: **Understand and Use Numbers**

Task Group C3: **Use measures**

Level: **3**

At this level, learners: **Use measures to make multi-step calculations; use specialized measuring tools**

**Performance Descriptors**

The learner:

- Calculates using numbers expressed as whole numbers, fractions, decimals, percentages, and integers
- Calculates the radius, diameter, and circumference of circles
- Understands and uses properties of angles and triangles to solve problems
- Understands and uses formulas for finding the perimeter, area, and volume of non-rectangular, composite shapes
- Manages unfamiliar elements (e.g. context, content) to complete tasks
- Makes estimates involving many factors where precision is required
- Interprets and represents measurements taken with specialized tools (e.g. callipers, multimeters)
- Chooses and performs required operations; makes inferences to identify required operations
- Selects appropriate steps to solutions from among options
- Identifies a variety of ways to complete tasks
- Interprets, represents, and converts measures using whole numbers, decimals, percentages, ratios, and fractions
- Organizes and displays numerical information (e.g. graphs, tables)
- Uses strategies to check accuracy (e.g. estimating, using a calculator, repeating a calculation, using the reverse operation)

**Task Descriptors**

- Scope of task may not be clearly defined
- May include unfamiliar elements (e.g. context, content)
- Requires multi-step calculations where one step builds on the previous step
- Requires the use of rates or common formulas or both
- May require converting measurements to make calculations
- May involve documents (e.g. rate tables, scale drawings)
- May require converting between whole numbers, decimals, fractions, ratios, and percentages
- May require converting between measurement systems or between units in one system

**ESKARGO:**

Embedded Skills, Knowledge and Attitudes Reference Guide for Ontario – C3.3