15/03/2024

What is the name given to the tapered bricks that are used in axed arches?

• Rough cut

• Soldier courses.

• voussoirs

• Double ringed.

When constructing arches we need to use arch ......, or .......pieces in order to support the structure.

There are two answers.

Explain how you would set an arch centre or turning piece up, ready for construction.

When working out the size of voussoirs we need to find the length of the .....

• Extrados.

• Intrados

• Collar joint.

• Skewback

What formula is used for finding the extrados of an arch.

• 
• 
• 
• TOP + THE BOTTOM

  DIVIDED BY 2

When setting an arch centre up it is important to ensure that it is kept inline with the jambs, using a builders .... pulled from corner to corner will help ensure this takes place.

When setting out for voussoirs what measurement will it not be able to be more than (a)  

• answer 65mm
• 75mm

Name as many arch terminology terms as you can.

Match the following

• Extrados.

• Intrados

• Bricks.

• The distance between the jambs.

• The angle that the arch sits against the

• The external arc of the arch

• span

• Vousssoirs

• radius

• Skewback

What is the primary purpose of a keystone in an arch?

• To add aesthetic appeal to the arch

• To lock all the stones into position

• To support the weight of the wall above

• To mark the center of the arch