Rich cement mortars are more liable to cracking as compared to lean mortars because rich mortars
have

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

Assertion A : For identical strength, a composite cement-lime mortar is preferred over cement
mortar.
Reason R : Composite cement-lime mortar has higher drying shrinkage than cement mortar.
Select your answer based on the codes given below:

other in a load bearing wall shall not be less than

The mode of failure of a very short masonry member having h/t ratio of less than 4 is by

Where a structural component or a system is providing lateral support to five or more walls or
columns, thelateral load to be resisted may be taken as _________ of the total vertical load on
the most heavily loaded wall or column in the group

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) Gableband 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 bemade of reinforced concrete only.
Of thesestatements, thecorrect statements are

The basic stress in masonry units having height to width ratio of 1.5 may be increased by a factor
of

The timber floor not spanning on the masonry wall but properly anchored to the wall gives

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

Consider the following statements:
The use of relatively weak mortar
1. Will accommodate movements due to loads and, cracking if any, and will be distributed as thin
hair cracks which are less noticeable or harmful.
2. Will result in reduction of stresses due to differential expansion of masonry units.
Of these statements

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

For designing masonry components of a structure, seismic forces provision in the design
calculation is not necessary for buildings constructedin

A 200 mmthick wall made of modular bricks is 5 m long between cross walls and 3.8 m clear
height between RCC slabs at top and bottom. The slenderness ratio of the wall is

Water retentivity for brick masonry should not be less than

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

Assertion A : Lime based mortars give higher ratio of brickwork strength to mortar strength as
compared to non-lime mortar.
Reason R : Lime based mortars have lower bond strength as compared to non-lime mortars.
Select your answer according to the codes given below:

In the caseof panel wall subjected to horizontal loads at right angles to the plane of the wall, with
the mortar not leaner than Ml type, tensile stress in bending in thevertical direction may be
allowed to the extentof

If the ratio of center to center spacing of intersecting walls to actual thickness of intersecting wall
is more than 20, then the stiffening coefficient for wall proper will be

Consider the following statements:
1. Masonry in rich cement mortar though having good strength with high shrinkage is much liable
for surface cracks.
2. Lime mortar possesses poor workability and poor water retentivity and also suffers high
shrinkage.
3. Masonry in lime mortar has better resistance against rain penetration and is less liable to crack
when compared to masonry in cement mortar.
Which of these statements are correct?

If the eccentricity ratio is more than 1/24, then increase in the permissible stress in the design of
wall subjected to eccentric loading as percode is

For masonrywork with solid bricks, consistency of mortar should be

Consider the following statements regarding provision of chases in masonry,
(i) No chase should be permitted in a half brick load-bearing wall,
(ii) Vertical chases should not be closerthan 2 m in any stretch of a wall,
(iii) Chases should be provided near to bearings of beams and lintels. Of these statements

For masonrybuilt in 1 : 1 : 6 cement-lime-sand mix mortar or equivalent, the horizontal shear
stress permissible on the area of a mortar bed joint is

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 limemortar 1 : 2 : 9 is used
(iii) Shall not exceed 24 if cement mortar 1 : 6 is used

Full restraint is provided by
(i) Foundation footing of a wall
(ii) Timber floorspanning on the wall and anchored to the wall
(iii) RCC slab with a minimum bearing of 10 cm on the wall

Consider the following statements:
A high lime content in a compositecement-lime mortar results in
1. Slow hardening.
2. Quick setting.
3. Weaker mortar. Of these statements

The effective height of free standing non-load bearing wall and column respectively will be
Where H is the height of wall or column between centers of supports

Assertion A : From consideration of structural soundness and economy of design, most codes
control the maximum slenderness ratio of masonry walls and columns.
Reason R : By controlling the maximum slenderness ratio, failure is by excessive stress and not by
buckling. Select your answer according to codes given below:

Assertion A : Limiting value of slenderness ratio for a column is less than that of a wall.
Reason R : A column can buckle around either of the two horizontal axes while a wall can buckle
around only one axis.
Select your answer according to the codes given below:

A 200 mm thick brick masonry wall made of modular bricks carries an axial load of 30 kN/m from
wall above and an eccentric load of 20 kN/m from RCC floor acting at a distance of 47.5 mm from
the centre line of the wall. The resultant eccentricity ratio is

The thickness of each leaf of a cavity wall shall not be less than

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

Direct load carrying capacity of a brick masonry wall standing freely as against when it supports RC
slab will be

Assertion A : For eccentricity ratio exceeding 1/6, effective thickness of masonry will get reduced.
Reason R : For eccentricity ratio exceeding 1/6, there will be tension on one side of the member.
Select your answer according to the codes give below:

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

For strengthening a 50 m long and 5 m high straight compound wall built in brick work, which one
of the following would be most suitable?

Minimum thickness of stiffening wall for 1 to 3 storeys shall not be less than

Cement mortars richer than 1 : 3 are not used in masonry because
(i) There is no gain in strength of masonry
(ii) There is high shrinkage
(iii) They are prone to segregation
Of these statements