Question 1

What is the value of the maximum annual temperature change used in the text in determining the maximum annual thermal expansion or contraction of a component?

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Question 2

What is a control joint and how does it differ from an expansion joint?

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Question 3

In determining the amount of thermal expansion or contraction of a component due to temperature change, check below the factor(s)that are not relevant.
1. Change in temperature of component
2. Compressive strength of the component's material
3. Tensile strength of the component's material
4. Original length of material
5. Coefficient of thermal expansion

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Question 4

What is the purpose of a separation joint?

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Question 5

Joints in building components are divided into three subtypes. Name them.

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Question 6

What is elastic deformation?

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Question 7

A movement joint allows stress- free expansion and contraction of buildings and components while a static joint subjects the building and components to movement stresses. So, why are movement stresses undesirable?

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Question 8

In which structural materials does creep take place and in which it does not?

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Question 9

Do metals (such as steel and aluminum)expand or contract greater than plastics, such as (polyethylene and nylon)when subjected to the same temperature change?

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Question 10

What is creep?

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Question 11

Movement joints are divided into two types: (i)building joints and (ii)component joints. Building joints are further subdivided into two types. Name them.

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Question 12

What is the typical width of a building separation joint?

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Question 13

If a rectangular building's dimension is large in both directions, can we have a separation joint (SJ)in both directions so that the building has two separation joints crossing each other at right angle? How many structurally independent buildings will such a design create?

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Question 14

Because the provision of static joints adds to the stresses on a component, requiring a larger cross section, which increases the cost of the component, should the static joints be avoided? Explain.

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Question 15

When the live load acts on a floor slab and the floor deflects downward, is the deflection in the slab an elastic or inelastic deflection?

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Question 16

Does every building require separation joint(s)? Explain.

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Question 17

Which structural materials (i)undergo moisture shrinkage only (no moisture expansion)during service, and which materials (ii)undergo both moisture expansion and shrinkage during service?

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Question 18

There are two types of joints in buildings: static joints (non- movement joints)and dynamic joints (movement joints). What is the advantage of movement joints over static joints?

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Question 19

A rectangular building with a large footprint in both directions has been provided with one separation joint (SJ)in each direction so that the SJs cross each other at right angle. The building is a frame structure, consisting of columns and beams and it has been decided to duplicate the columns and beams at the joint. How many columns will be needed at the location where the joints cross?

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Question 20

Which structural materials (i)undergo both thermal expansion and thermal contraction during service, and which materials (ii)undergo only moisture expansion (no moisture shrinkage)during service?

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Quiz 9: Principles of Joints and Sealants Expansion and Contraction Control