What Is A Disadvantage Of Using Fire Retardant Treatments On Wood?

What is meant by dimensional lumber?

Dimensional lumber is wood lumber that is cut to pre-defined, standard sizes.

Dimensional lumber sizes refer to depth and width, not length.

Dimensional lumber is the most common type of lumber used for building because its consistent sizing allows builders to use it interchangeably throughout the home..

Which type of construction material has a fire resistance rating between one and two hours for walls floors and roofs?

Modified Fire Resistive: Buildings where the exterior walls and the floors and roof are constructed of masonry or fire resistive material with a fire resistance rating of one hour or more but less than two hours.

What are the signs of a potential backdraft?

Common signs of backdraft include a sudden inrush of air upon an opening into a compartment being created, lack of visible signs of flame (fire above its upper flammability limit), “pulsing” smoke plumes from openings and auto-ignition of hot gases at openings where they mix with oxygen in the surrounding air.

What is a disadvantage of using wood in construction quizlet?

What is a disadvantage of using wood in construction? Weather conditions can affect the size and shape of wood.

What is a disadvantage of using wood in construction?

The disadvantages to wood construction include vulnerability to water damage, fire, decay, and termites. … Wood is also a less environmentally sustainable choice than green building materials such as composite lumber or recycled steel.

Can wood be treated against fire?

FIRE RETARDANT TREATED WOOD (FRTW) is designed to resist to flame spread & smoke development caused by fire and/or fire propagation.

Why do firefighters vent the roof?

When a hole is made in the roof because the building is “vented,” the smoke and gases escape because heat and smoke rise. It makes it much easier for the firefighters in the building to see. … Another reason for venting the roof is to see how far the fire has progressed.

Which type of walls act as barriers to fire spread?

Fire Barrier Wall or Fire Partition Wall – an interior wall that serves to restrict the spread of fire, but does not qualify as a firewall. A fire barrier wall subdivides a floor or an area and is erected to extend from the floor to the underside of the floor or roof above.

How do you make wood fire resistant?

Fill a bucket with 2 quarts of water.Pour 1/2 cup zinc chloride and 1/4 cup ferric chloride into the water, together with 3 tbsp. each of boric acid and ammonium phosphate. … Mix the ingredients thoroughly. Paint or spray two to three coats of the mixture onto your wood to protect it from fire.

What is one of the biggest HVAC issues for firefighters?

A return air plenum is one of the biggest concerns for firefighters. The plenum is the space above the ceiling and below the floor or roof. When we introduce super heated products of combustion into this space through the return air portion of the HVAC system, we may not even know it but need to be aware of the risks.

Which of the following is a disadvantage of engineered wood products?

What are its Advantages and Disadvantages?Advantages of Engineered WoodDisadvantages of Engineered WoodTheir surfaces can also be enhanced with decorative laminates and attractive finishes.A major drawback of MDF is they are not water-resistant and hence exhibit a tendency to soak up water and swell.11 more rows•Jul 28, 2020

What is a primary safety limitation of I joists that are made of engineered wood?

What is a primary safety limitation of I-joists that are made of engineered wood? They have the possibility of swift collapse under fire conditions.

What is the primary fire hazard associated with ordinary construction?

Elongate. What is the primary fire hazard associated with ordinary construction? Fire extension through concealed spaces. What is a commonly used structural material in a Type I building?

When buildings become unmarketable they frequently become a target for?

20 Cards in this Setsteel replaced most heavy timbers in multistory commercial buildings because:Timber is weaker than steelone very basic aspect of building safety is the provision of:an adequate number of exitswhen buildings become unmarketable, they frequently become a target for:Arson17 more rows

What is fire retardant wood treated with?

How Is Fire Retardant Wood Made? All fire-retardant wood starts with kiln-dried untreated wood and plywood. The exact retardant applied to the wood depends on the manufacturer as most of the chemicals used are proprietary. However, almost all fire-retardant wood is made using a pressure system.

Which of the following is a limitation of fire resistance laboratory test findings?

Which of the following is a limitation of fire resistance laboratory test findings? Fire-rated assemblies may behave differently in laboratory settings than they do in uncontrolled conditions. The only standardized test method for fire resistance that is universally accepted by building codes is the: ASTM E-119 test.

What potential fire safety hazard does an atrium pose?

Buildings with atria, however, can be dangerous for occupants in a fire. A large, unenclosed shaft that extends upward through multiple floors is contrary to fire safety, which asserts that compartmentation is required to limit the spread of fire and smoke from the point of origin.

What is the most fire resistant wood?

Mediterranean CypressMediterranean Cypress has proven to be the most fire resistant of all.