DESIGN OF MASONRY STRUCTURES QUIZ

In a cavity wall, both leaves of which are load bearing, the effective thickness is taken as

Sum of thickness of both leaves

Actual thickness of the stronger leaf

Larger of (B) and (C)

Two-third of the sum of thickness of both the leaves

TRUE ANSWER : ?
YOUR ANSWER : ?

If ‘H’ is the height of wall between centers of supports, then the effective height of wall where concrete floors have a bearing on wall irrespective of the direction of span will be

0.85 H

1.0 H

1.5 H

0.75 H

TRUE ANSWER : ?
YOUR ANSWER : ?

A free standing brick wall 20 cm thick is subjected to a wind pressure of 75 kg/m². The maximum height of wall from stability consideration is

1.5 m

1.28 m

0.64 m

0.96 m

TRUE ANSWER : ?
YOUR ANSWER : ?

Consider the following statements regarding bands to be provided for strengthening masonry work in masonry buildings constructed in zone III, IV and V. (i) Lintel band is provided at lintel level on partition walls, (ii) Gable band is provided at top of gable masonry below the purlins, (iii) The bands shall be to full width of the wall and not less than 7.5 cm in depth, (iv) The bands shall be made of reinforced concrete only.of these statements, the correct statements are

(ii) and (iii)

(i) and (iii)

(ii) and (iv)

(i) and (ii)

TRUE ANSWER : ?
YOUR ANSWER : ?

The effective height of free standing non-load bearing wall and column respectively will be

1.0H and 1.0H

2.0H and 2.0H

1.5H and 1.5H

2.0H and 1.5H

TRUE ANSWER : ?
YOUR ANSWER : ?

Minimum compressive strength in N/mm² for H1 type mortar used for masonry is

7.5

10

5

3

TRUE ANSWER : ?
YOUR ANSWER : ?

If the horizontal cross-sectional area of a wall is 1200 cm², then the basic stress shall be multiplied by a reduction factor equal to

0.75

0.95

0.85

0.6

TRUE ANSWER : ?
YOUR ANSWER : ?

Maximum slenderness ratio of load bearing walls for a dwelling having more than 2 storeys(i) Shall not exceed 12 if lime mortar is used(ii) Shall not exceed 18 if cement lime mortar 1 : 2 : 9 is used(iii) Shall not exceed 24 if cement mortar 1 : 6 is used

(ii) and (iii) are correct

(i) and (iii) are correct

(i) and (ii) are correct

(i) and (ii) and (iii) are correct

TRUE ANSWER : ?
YOUR ANSWER : ?

The bending stress in a wall or column subjected to effective vertical load need not be considered, if the eccentricity ratio is

Less than or equal to 1/6

Less than or equal to 1/12

More than 1/24

Less than or equal to 1/24

TRUE ANSWER : ?
YOUR ANSWER : ?

Water retentivity for brick masonry should not be less than

70 %

50 %

60 %

80 %

TRUE ANSWER : ?
YOUR ANSWER : ?

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