If the length of a wall on either side of a lintel opening is at least half of its effective span L, the load W carried by the lintel is equivalent to the weight of brickwork contained in an equilateral triangle, producing a maximum bending moment

RCC Structures Design
If the length of a wall on either side of a lintel opening is at least half of its effective span L, the load W carried by the lintel is equivalent to the weight of brickwork contained in an equilateral triangle, producing a maximum bending moment

WL/8

WL/4

WL/2

WL/6

WL/8

WL/4

WL/2

WL/6

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RCC Structures Design
If A is the area of the foundation of a retaining wall carrying a load W and retaining earth of weight 'w' per unit volume, the minimum depth (h) of the foundation from the free surface of the earth, is

h = (W/Aw) [(1 + sin φ)/(1 + sin φ)]

h = (W/Aw) [(1 - sin φ)/(1 + sin φ)]

h = (W/Aw) [(1 - sin φ)/(1 + sin φ)]²

h = √(W/Aw) [(1 - sin φ)/(1 + sin φ)]²

h = (W/Aw) [(1 + sin φ)/(1 + sin φ)]

h = (W/Aw) [(1 - sin φ)/(1 + sin φ)]

h = (W/Aw) [(1 - sin φ)/(1 + sin φ)]²

h = √(W/Aw) [(1 - sin φ)/(1 + sin φ)]²

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RCC Structures Design
If W is total load per unit area on a panel, D is the diameter of the column head, L is the span in two directions, then the sum of the maximum positive bending moment and average of the negative bending moment for the design of the span of a square flat slab, should not be less than

WL/10 (L - 2D/3)²

WL/10 (L + 2D/3)²

WL/12 (L - D/3)²

WL/12 (L - 2D/3)²

WL/10 (L - 2D/3)²

WL/10 (L + 2D/3)²

WL/12 (L - D/3)²

WL/12 (L - 2D/3)²

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RCC Structures Design
In a pre-stressed beam carrying an external load W with a bent tendon is having angle of inclination ? and pre-stressed load P. The net downward load at the centre is

W - 2P sin θ

W - P cos θ

W - P sin θ

W - 2P cos θ

W - 2P sin θ

W - P cos θ

W - P sin θ

W - 2P cos θ

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RCC Structures Design
In a doubly-reinforced beam if ‘c’ and ‘t’ are stresses in concrete and tension reinforcement, ‘d’ is the effective depth and ‘n’ is depth of critical neutral axis, the following relationship holds good

mc/t = (d - n)/t

(t + c)/n = (d + n)/n

(m + c)/t = n/(d + n)

mc/t = n/(d - n)

mc/t = (d - n)/t

(t + c)/n = (d + n)/n

(m + c)/t = n/(d + n)

mc/t = n/(d - n)

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RCC Structures Design
The load stress of a section can be reduced by

Increasing the total perimeter of bars

Replacing smaller bars by greater number of greater bars

Decreasing the lever arm

Replacing larger bars by greater number of small bars

Increasing the total perimeter of bars

Replacing smaller bars by greater number of greater bars

Decreasing the lever arm

Replacing larger bars by greater number of small bars

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RCC Structures Design

RCC Structures Design If the length of a wall on either side of a lintel opening is at least half of its effective span L, the load W carried by the lintel is equivalent to the weight of brickwork contained in an equilateral triangle, producing a maximum bending moment

RCC Structures Design If A is the area of the foundation of a retaining wall carrying a load W and retaining earth of weight 'w' per unit volume, the minimum depth (h) of the foundation from the free surface of the earth, is

RCC Structures Design In a pre-stressed beam carrying an external load W with a bent tendon is having angle of inclination ? and pre-stressed load P. The net downward load at the centre is

RCC Structures Design In a doubly-reinforced beam if ‘c’ and ‘t’ are stresses in concrete and tension reinforcement, ‘d’ is the effective depth and ‘n’ is depth of critical neutral axis, the following relationship holds good

RCC Structures Design The load stress of a section can be reduced by

RCC Structures Design
If the length of a wall on either side of a lintel opening is at least half of its effective span L, the load W carried by the lintel is equivalent to the weight of brickwork contained in an equilateral triangle, producing a maximum bending moment

RCC Structures Design
If A is the area of the foundation of a retaining wall carrying a load W and retaining earth of weight 'w' per unit volume, the minimum depth (h) of the foundation from the free surface of the earth, is

RCC Structures Design
In a pre-stressed beam carrying an external load W with a bent tendon is having angle of inclination ? and pre-stressed load P. The net downward load at the centre is

RCC Structures Design
In a doubly-reinforced beam if ‘c’ and ‘t’ are stresses in concrete and tension reinforcement, ‘d’ is the effective depth and ‘n’ is depth of critical neutral axis, the following relationship holds good

RCC Structures Design
The load stress of a section can be reduced by