info revision

Core 04

Revision

Safety signs: There are 5 different colours

• green

• blue

• yellow

• red

• red and white

Green signs are safety signs

"THE SAFE WAY"

Blue signs are MANDATORY

"YOU MUST DO SOMETHING"

Yellow signs:

These are warning or caution signs

Red signs are Prohibition signs

"YOU MUST NOT"

Red and white signs

These represent fire signs

Fire Extinguishers

Do you know the colours of fire extinguishers?

All fire extinguishers are red

They have a coloured lable to identify what they will emit and should only be used on the correct fires as not to cause further injury

RED

• These are all red

• They spray water

• They are for use on: Organic fires e.g. paper, wood, straw, plastics, coal, soft furnishings

• They should not be used on electrical or deep fat fires

BLUE

• These emit Dry powder

• Organic solids plus flammable liquids e.g. petrol, oil, solvents, paraffin, tars; flammable liquids e.g. propane, butane, methane; metals and swarf; electrical fires

• Not suitable for electrical fires over 1,000 volts

• 
  

CREAM

• These are for Organic solids, flammable liquids.

• They are not suitable for domestic fires

• 
  

Black

• These are Carbon Dioxide

• We use these on electrical fires

• Suitable for high and low voltage electrical fires

Yellow

• Wet Chemical

• These are used on Organic solids, cooking oils and fats

• These are suitable for extremely high temperature fires

A FIRE NEEDS THREE THINGS TO SURVIVE CAN YOU NAME THESE?

• Heat

• Fuel

• Oxygen

• Remove any one of these three and a fire will die!

Drawing scales

Drawings are drawn to scale to enable them to fit on the paper

Block plan

These show the site and surrounding area.

Common scales are

1:250 - 1:2500

Site plans these show the whole site or individual plots.

Common scales of

1 : 200 - 1 : 500

Working drawings

Common scales of:

1:50 - 1:100

Assembly or component drawings

Common scale of:

1:5 - 1:20

Hatchings

Symbols to identify components

Abbreviations

Components are commonly abbreviated.

Website for acronyms or abbreviations

https://www.designingbuildings.co.uk/wiki/Construction_industry_acronyms