1 / 14

FIXED INSTALLATIONS

FIXED INSTALLATIONS. DRY AND WET RISERS. COMPETENCE STATEMENT 373. AIM To enable the individual to use a rising main for firefighting. OBJECTIVES 1) Recognize a dry riser inlet 2) Recognize a dry/wet riser outlet 3) State the building heights for dry/wet risers

kathryn
Download Presentation

FIXED INSTALLATIONS

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. FIXED INSTALLATIONS DRY AND WET RISERS COMPETENCE STATEMENT 373

  2. AIM To enable the individual to use a rising main for firefighting OBJECTIVES 1) Recognize a dry riser inlet 2) Recognize a dry/wet riser outlet 3) State the building heights for dry/wet risers 4) List the actions to be taken to check a dry riser system 5) Deploy a firefighting jet from a riser 6) Describe the system to drain a dry riser 7) Describe typical locations of dry/wet riser outlets

  3. TYPES OF BUILDINGS WITH RISERS • 1) High rise :- Dwelling Offices Factories • 2) Multi - storey car parks • 3) Shopping centres Air valve Dry rising main Inlet Drain valve

  4. DRY RISER INLET • 1) Usually housed in a wired glassfronted box: At ground level Near front entrance External wall • 2) Identified by the words DRY RISERpainted in red on the glass • 3) Normally two fire service inlets inside the box

  5. DRY/WET RISER OUTLET • 1) A valve with a wheel type handle and a female instantaneous coupling • 2) Direction for opening is shown on the wheel itself or on a plate between the wheel and the locking nut • 3) Usually locked closed with a wire and lead seal or a leather strap to prevent unauthorised use

  6. LOCATION OF RISER OUTLET • 1) a) Firefighting staircase lobby • b) Enclosed staircase • 2) On every floor or every alternate floor • 3) May be in a marked glazed cupboard

  7. ADVANTAGES OF RISING MAINS • 1) Hose quickly got to work • 2) Greater capacity • 3) Less risk of water damage • 4) Adjacent buildings are covered

  8. CHECKING DRY RISER SYSTEM • 1) Ensure all landing valves are closed prior to charging • 2) Drain after use • 3) Ensure all landing valves are closed before leaving • 4) Report any defects to a responsible person

  9. DEPLOYING A FIREFIGHTING JET FROM A RISER • 1) Two lengths of 45mm hose and a branch will have been supplied to the floor below the fire • 2) Taking hose through fire doors from stairwell to corridor where fire is may allow products of combustion to affect bridgehead • 3) It may be possible to use Fixed Installation hosereels • 4) Commence salvage operations on the floor below the fire as soon as possible

  10. DRAINING A DRY RISER • 1) Drain hose out of a window and disconnect • 2) Close landing valves • 3) Open drain cock at riser inlet • 4) If auto air valve is not fitted open top landing valve • 5) If top landing valve was opened close it

  11. QUESTIONS • 1) State the building heights for both dry and wet risers • Buildings greater than 18m – Dry Riser. • Buildings greater than 60m – Wet Riser. • 2) Where would the dry riser inlet usually be found? • At ground level. • Near front entrance. • External wall. • 3) What is the purpose of the air valve in a dry rising system? • Vents air out of system when charging and lets air into system when draining.

  12. QUESTIONS cont’d • 4) List four advantages of using rising mains • Hose quickly got to work. • Greater capacity. • Less risk of water damage. • Adjacent buildings are covered. • 5) List the precautions taken when checking dry risers • Ensure all landing valves are closed prior to charging. • Drain after use. • Ensure all landing valves are closed before leaving. • Report any defects to a responsible person.

  13. QUESTIONS cont’d • 6) Where are riser outlets normally found? • Firefighting staircase lobby. • Enclosed staircase. • On every floor or every alternate floor. • May be in a marked glazed cupboard. • 7) Name three types of building where risers are normally installed • High rise:- Dwellings • Offices • Factories • Multi-storey car parks • Shopping Centres

  14. QUESTIONS cont’d • 8) What device is fitted to landing valves to protect fire brigade hose and on what type of riser would it be found? • Pressure regulators on Wet Risers. • 9) What are the three sources of water for a wet riser? • 1) Water Main, 2) Gravity Tanks, 3) Booster pumps supplied from storage tanks. • 10) What is the procedure for draining a dry riser? • a) Drain hose out of a window and disconnect. • b) Close landing valves. • c) Open drain cock at riser inlet. • d) If auto air valve is not fitted open top landing valve. • e) If top landing valve was opened close it.

More Related