207 QUIZ 4 Fire door frames and linings 04032025

What material are interior door casings typically made from?

• Hardwood

• Softwood

• Metal

• Plastic

Why are internal door casings lighter in construction than door frames?

• They are made from metal

• They are made from hardwood

• They are designed to cope with different wall thicknesses

• They are made from softwood

What is the primary function of the jambs in a door frame?

• To provide decoration

• To take the weight of the door

• To prevent water ingress

• To act as a threshold

What material are external door casings often made from?

• Softwood

• Plastic

• Hardwood

• Metal

What is the bottom piece of the door frame called?

• Jamb

• Head

• Cill

• Threshold

What is the recommended density for hardwood frames for 60-minute fire doors?

• 450 kg/m3

• 550 kg/m3

• 650 kg/m3

• 750 kg/m3

What should be used to fill any voids in door frames or casings?

• Wood chips

• Mineral fibre or paste

• Plastic foam

• Metal sheets

What is the purpose of a threshold in a door frame?

• To support the door

• To prevent ingress of water and draughts

• To add aesthetic value

• To increase door height

According to the BWF, what is the minimum density for softwood frames for 30-minute fire doors?

• 350 kg/m3

• 450 kg/m3

• 550 kg/m3

• 650 kg/m3

What should door frames or casings be built with to withstand fire?

• Plastic

• Metal

• Brick or block

• Glass