By over- reinforcing a beam , the moment of resistance can be increased not more than

1. 10%
2. 15%
3. 20%
4. 25%

#RC
#rebar
#structure

@etconp

Identify this joint ?

#rebar

@etconp

Bar calculation

👉🏿It’s very import lecture note 📝 for students who are wondering for different types of bar calculations here you go (እጅግ በጣም አስፈላጊ የሆነ lecture notes 📝 የተለያዩ አይነት bar length calculation ይፈልጋሉ ይኸውሎት)

👉🏿 worked examples ( የተሰሩ ጥያቄዎች )

👉🏿 content(ይዘት):-

1.90° bend
2.180° bend
3. Overlap
4. for bent up bars
5. Lateral ties or vertical stirrups
6. Bent up and hook

ይህን ለጓደኞቾ ይጋግሩት

1.2MB PDF file

#share_it_with_your_friends
#rebar
#calculation
#worked_example

@etconp

ጥያቄ

The maximum diameter of a bar used in ribbed slab is _____?

1. 12 mm
2. 16 mm
3. 20 mm
4. 22 mm

#rebar # ribbed #slab

@etconp

👉You can see worked circular slab calculation.

🚧And we have attached @zebuu1028’s answer

🚧የተሰራ የ circular slab reinforcement calculation

⏺የ እህታችን የ @zebuu1028 መልስም አያይዘናል።

🚩የ ፋይሉ መጠን 658KB የገፅ ብዛት 4 ነው።

#rebar #circularslab #watermark

@etconp

Bar calculation

👉🏿It’s very import lecture note 📝 for students who are wondering for different types of bar calculations here you go (እጅግ በጣም አስፈላጊ የሆነ lecture notes 📝 የተለያዩ አይነት bar length calculation ይፈልጋሉ ይኸውሎት)

👉🏿 worked examples ( የተሰሩ ጥያቄዎች )

👉🏿 content(ይዘት):-

1.90° bend
2.180° bend
3. Overlap
4. for bent up bars
5. Lateral ties or vertical stirrups
6. Bent up and hook

ይህን ለጓደኞቾ ይጋግሩት

1.2MB PDF file

#share_it_with_your_friends
#rebar
#calculation
#worked_example

@etconp

Bar calculation

👉🏿It’s very import lecture note 📝 for students who are wondering for different types of bar calculations here you go (እጅግ በጣም አስፈላጊ የሆነ lecture notes 📝 የተለያዩ አይነት bar length calculation ይፈልጋሉ ይኸውሎት)

👉🏿 worked examples ( የተሰሩ ጥያቄዎች )

👉🏿 content(ይዘት):-

1.90° bend
2.180° bend
3. Overlap
4. for bent up bars
5. Lateral ties or vertical stirrups
6. Bent up and hook

ይህን ለጓደኞቾ ይጋግሩት

1.2MB PDF file

#share_it_with_your_friends
#rebar
#calculation
#worked_example

@etconp

Bar calculation

👉🏿It’s very import lecture note 📝 for students who are wondering for different types of bar calculations here you go (እጅግ በጣም አስፈላጊ የሆነ lecture notes 📝 የተለያዩ አይነት bar length calculation ይፈልጋሉ ይኸውሎት)

👉🏿 worked examples ( የተሰሩ ጥያቄዎች )

👉🏿 content(ይዘት):-

1.90° bend
2.180° bend
3. Overlap
4. for bent up bars
5. Lateral ties or vertical stirrups
6. Bent up and hook

ይህን ለጓደኞቾ ይጋግሩት

1.2MB PDF file

#share_it_with_your_friends
#rebar
#calculation
#worked_example

@etconp

ጥያቄ

The maximum diameter of a bar used in ribbed slab is _____?

1. 12 mm
2. 16 mm
3. 20 mm
4. 22 mm

#rebar # ribbed #slab

@etconp

👉You can see worked circular slab calculation.

🚧And we have attached @zebuu1028’s answer

🚧የተሰራ የ circular slab reinforcement calculation

⏺የ እህታችን የ @zebuu1028 መልስም አያይዘናል።

🚩የ ፋይሉ መጠን 658KB የገፅ ብዛት 4 ነው።

#rebar #circularslab #watermark

@etconp

ጥያቄ

The maximum diameter of a bar used in ribbed slab is _____?

1. 12 mm
2. 16 mm
3. 20 mm
4. 22 mm

#rebar # ribbed #slab

@etconp

👉You can see worked circular slab calculation.

🚧And we have attached @zebuu1028’s answer

🚧የተሰራ የ circular slab reinforcement calculation

⏺የ እህታችን የ @zebuu1028 መልስም አያይዘናል።

🚩የ ፋይሉ መጠን 658KB የገፅ ብዛት 4 ነው።

#rebar #circularslab #watermark

@etconp

👉Basic Knowledge for Construction Site Engineers

🔩 Steel Weight Calculation

- Formula (Metric):
Weight of steel (kg/m) = {D^2}{162}
(D = diameter in mm)
- Formula (Imperial):
Weight of steel (kg/ft) = {D^2}{533}

🎲These formulas help quickly estimate reinforcement steel weight for cost and quantity calculations.

🧱 Concrete Test Cube
- Standard size: 150 × 150 × 150 mm
- Layers: Cube is cast in 3 layers, each compacted properly to avoid voids.

🪣 Slump Cone Test
- Used to check workability of concrete.
- Slump cone is filled in 3 equal layers, each tamped with 25 strokes.

🏗️ Reinforcement Percentages
- Column steel:
- Minimum: 0.8% of gross area
- Maximum: 2% of gross area
- Beam steel:
- Minimum: 0.7% of gross area
- Maximum: 1% of gross area

🎲Ensures structural safety and prevents over-reinforcement.

🧱 Shear Wall Thickness
- Minimum thickness: 150 mm
- Maximum thickness (common practice): 400 mm
- Provides lateral stability against wind and earthquake forces.

🪜 Staircase Slope
- Recommended slope: 25° to 40°
- Ensures comfort and safety for users.

📏 Nominal Cover (Concrete Cover)
- Footing: 50 mm
- Column: 40 mm
- Slab: 20 mm

💫Protects reinforcement from corrosion and fire.

🎯 Key Takeaways

- These values are standard site references every civil engineer should memorize.
- They ensure quality control, safety, and compliance with construction practices.
- Quick formulas like steel weight and slump cone layers are time-savers on site.

#CivilEngineering #CivilEngineer #SiteEngineer #ConstructionLife #EngineeringBasics #StructuralEngineering #Concrete #Rebar #SteelDesign #ConstructionSite #EngineeringKnowledge #CivilTechTime #SiteWork #BuildingConstruction #EngineeringFacts #ConstructionTips #CivilEngineeringWorld #EngineerLife #Infrastructure #ConcreteDesign #ConstructionEducation #CivilStudents #EngineeringIndia #SiteExecution #TechnicalKnowledge

@etconp

👉Cantilever Reinforcement — Incorrect vs Correct

🌟A cantilever beam/slab behaves differently from a simply supported member.

⏺Under normal downward loading, the top face near the fixed support is the primary tension zone, so the main flexural reinforcement must be placed at the top and properly anchored into the support.

☄Key details:

🔴 Incorrect: Main reinforcement placed at the bottom.

🔴 Incorrect: Inadequate anchorage into the supporting member.

🔴 Result: Increased top-face cracking and excessive downward deflection may occur.

🟢 Correct: Main tension reinforcement is placed at the top.

🟢 Proper anchorage: Reinforcement must be adequately developed/anchored into the support.

🟢 Bottom zone: Primarily compression under the idealized bending action shown.

🟢 Important: Reinforcement location, development length, bar diameter, spacing, cover, and detailing must be designed according to the applicable structural code and actual loads.

⬆️Technical principle:
Concrete is strong in compression but relatively weak in tension. In a cantilever subjected to downward loading, tensile stresses develop primarily at the top near the fixed end, making correct reinforcement placement critical for structural safety and serviceability.

⚠️ Note: This is a general detailing principle. Actual reinforcement should always be determined by structural design calculations and the applicable code.

#CivilEngineering #Cantilever #CantileverBeam #RCC #Reinforcement #StructuralEngineering #Concrete #Rebar #SteelReinforcement #RCCDesign #Construction #ConstructionDetails #StructuralDesign #EngineeringEducation #CivilEngineeringTips #BuildingConstruction #ReinforcedConcrete #ConcreteStructures #SiteEngineering

@etconp