Ethio Construction Engineering
32.4K subscribers
6.23K photos
359 videos
1.99K files
3.2K links
πŸ”¨ World Construction Engineering
Latest updates, tips, and tutorials on building, civil engineering, and construction in World.
Learn, build, and grow with us!

πŸ“¨ @Philemona7 Or @ETCONpBOT

For Ad:- https://telega.io/c/etconp
Download Telegram
Study the following statements and identify the correct options:
1. The going of step is the vertical distance between two successive riser - faces
2.String is the sloping members which support the steps in a stair. They run along the slope if the stair.
Anonymous Quiz
23%
A is true but B is fasle
35%
A is false but B is true
31%
Both are true
6%
Both are fasle
4%
Information insufficient
❀4
Which of the following Samplings does not test the quality before or alter the Sampling?
Anonymous Quiz
23%
Grab Sampling
42%
Random Sampling
13%
Composite Sampling
22%
Flow weighted Composite Sampling
❀3πŸ‘2
The width of runway pavement for the Airport type D is _?
Anonymous Quiz
34%
45
34%
30.5
16%
18
16%
22.5
❀5
2. The minimum curing period for concrete exposed to hot weather conditions (above 50% relative humidity) as per IS 456:2000 is:
Anonymous Quiz
19%
A. 3 days
45%
B. 7 days
9%
C. 10 days
27%
D. 14 days
πŸ‘7
The Entrained air percentage of nominal maximum size aggregate 40mm is :
Anonymous Quiz
42%
4+-1
27%
5+-1
13%
6+-1
18%
3+-1
❀5
πŸ‘‰ INTERCON Construction Chemicals 

● Concrete Admixtures
● Bonding Agents
● Waterproofings
● Wall Putty, Prime Coat
● Concrete Repair Mortar
● Floor hardener, Epoxy
● Grout, Self-level mortar
● Quartz paint, Contextra
● Tile Adhesive & Tile Joint Fillers 
● Geotextiles and other construction chemicals and materials

☎️ Tel: 0961955555

πŸ”Ή Address 1: Signal road, around
Dinberwa Hospital

πŸ”Ή Addres 2: Wellosefer, Infront of
Dani Plaza
❀4πŸ”₯1
πŸ‘‰Shoring, Underpinning & Dewatering

⭐️1. Shoring

⏺Shoring is a temporary structure used to support a building, structure, or trench to prevent collapseduring construction or repair.

⏺It helps stabilize the structure and ensures safety during excavation oralterations.

❇️Types of Shoring:

β€’ Raking Shoring
β€’ Flying Shoring
β€’ Dead Shoring

⭐️2. Underpinning

⏺Underpinning is the process of strengthening and stabilizing the foundation of an existing buildingor structure.

⏺It is done when the original foundation is not strong enough or when adjacentexcavation affects stability.

❇️Methods of Underpinning:

β€’ Mass Concrete Underpinning
β€’ Beam and Base Underpinning
β€’ Mini Piled Underpinning
β€’ Pile and Beam Method

⭐️3. Dewatering

⏺Dewatering is the process of removing groundwater or surface water from a construction site tocreate a dry and stable work environment.

⏺It is essential during deep excavations or foundationworks.

🚧Methods of Dewatering:

β€’ Well Point System
β€’ Deep Well System
β€’ Sump Pumping
β€’ Ejector System

πŸ“œConclusion:

⏺Shoring, underpinning, and dewatering are essential techniques in civil engineering that ensure thestability, safety, and efficiency of construction projects.

⏺They protect existing structures, providestable foundations, and maintain dry working conditions.

@etconp
❀13πŸ‘1
πŸ‘‰Retaining Wall Vs Shear Wall

πŸ’«A retaining wall and a shear wall are both structural walls, but they serve completely different purposes in construction.

🚧Here is a detailed description of the difference between them:

❇️1. Purpose and Function
Retaining Wall:A retaining wall is built to hold back or retain soil or earth on one side so that the ground level on the two sides of the wall remains different.
⏺It resists lateral pressure caused by soil, water, or backfill materials. For example, it is used when constructing basements, garden terraces, roads on hilly areas, or when one part of the ground is at a higher level than the other.

🏷Shear Wall:A shear wall is constructed to resist horizontal or lateral forces acting on a building due to wind, earthquake, or other external loads.
⏺It provides lateral stiffness and strength to prevent the structure from swaying or collapsing. Shear walls are used mainly in multistory buildings and high-rise structures to make them more stable under lateral loads.

🏷2. Type of Load Resisted
Retaining Wall:It resists lateral earth pressure (from soil) and sometimes hydrostatic pressure (from water). The pressure acts horizontally from the retained material toward the wall.

🚧Shear Wall:It resists lateral loads from wind, seismic, or blast forces that act on the building structure. These forces try to push or twist the building horizontally.

🏷3. Structural Behavior
Retaining Wall: It behaves like a cantilever beam fixed at the base, designed to counter the overturning, sliding, and bearing pressures of the retained earth. Stability is its main focus.

🚧Shear Wall:It acts as a vertical cantilever spanning between floors, transferring horizontal loads down to the foundation. It mainly resists shear forces and bending moments caused by lateral loads.

🏷4. Location and Construction
Retaining Wall:Usually constructed outside or along the edges of structuresβ€”like in basements, hill roads, embankments, or landscaping areasβ€”where there is a level difference in ground elevation.

🚧Shear Wall:Constructed within the building frame, often around staircases, lift cores, and exterior walls. It becomes part of the building’s structural frame system.

🏷5. Materials and Design
Retaining Wall: Commonly made of reinforced concrete, stone masonry, or brick masonry.
⏺The design considers earth pressure theories such as Rankine or Coulomb methods.

🚧Shear Wall:Typically made of reinforced concrete or sometimes structural steel or wood (in light structures). The design follows structural analysis for lateral loads in accordance with building codes for wind and earthquake resistance.

🏷6. Example of Use
Retaining Wall Example: The wall supports soil behind a basement or along a road cut on a hill.

🚧Shear Wall Example:
The vertical concrete wall in a tall apartment building that resists earthquake shaking and prevents the building from swaying.

πŸ“œSummary in Simple Words

⏺A retaining wall holds back soil.
⏺A shear wall holds back horizontal forces on a building.

@etconp
❀18πŸ‘5
πŸ‘‰PROJECT SCHEDULING IN A NUTSHELL

πŸ•“ PERT (Program Evaluation & Review Technique)
Used when activity durations are uncertain.

⭐️It uses three time estimates:

β€’ ⚑ Optimistic (O)
β€’ βš™οΈ Most Likely (M)
β€’ 🐒 Pessimistic (P)
Formula β†’ Te = (O + 4M + P) / 6

🎲Helps predict project duration and risk of delay.

🧭 CPM (Critical Path Method)
Used when durations are known.
It finds the longest path in the project network β€” called the Critical Path.
Any delay on this path = delay in the entire project!

πŸ“… Scheduling Steps

1️⃣ List all activities.
2️⃣ Estimate duration & sequence.
3️⃣ Draw a network (PERT/CPM chart).
4️⃣ Identify the critical path.
5️⃣ Track progress using Gantt Chart, Primavera, or MS Project.

πŸ’‘ Critical Path = Project Lifeline
πŸ’‘ PERT = Handle Uncertainty

#ProjectManagement #CivilEngineering #PERT #CPM #ConstructionPlanning

@etconp
❀21πŸ‘6
ADVERTISMENT

α‰³αˆαˆ«α‰΅ α•αˆŒα‰΅ αŠ₯αŠ“ αŒ„ α‰¦αˆα‰΅ αŠ α‰…αˆ«α‰’

βœ…α‹¨αˆαŠ•αˆ°αŒ£α‰Έα‹ αŠ αŒˆαˆαŒαˆŽα‰Άα‰½

πŸ”… α•αˆŒα‰΅ any Size & thickness
πŸ”… αŒ„ α‰¦αˆα‰΅ (αŒ₯ርሡ αˆ›α‹‰αŒ£α‰΅αŠ“ αˆ›αŒ α)

πŸ”… α‹¨α‰°αˆˆα‹«α‹©  [modefic] αˆ΅αˆ«α‹Žα‰½αŠ• αŠ₯αŠ•αˆ°αˆ«αˆˆαŠ•α’

♦️ αˆ›αŠ•αŠ›α‹‰αŠ•αˆ α‰₯αˆ¨α‰³ α‰₯αˆ¨α‰΅ αŠ₯αŠ•αŒˆα‹›αˆˆαŠ•α’

☎️ሡልክ 0904040477 α‹ˆα‹­αˆ 0911016833 α‹°α‹αˆˆα‹ α‹«αŒαŠ™αŠ•
πŸ“±α‰΄αˆŒαŒαˆ«αˆ αˆ‹α‹­ ፦https://t.me/heavenic1

αŠ α‹΅αˆ«αˆ»α¦  ቁ 1.αˆ˜αˆ­αŠ«α‰Ά
                ቁ.2 αŠ α‹¨αˆ­ αŒ€αŠ“  αŠͺα‹³αŠ αˆαˆ…αˆ¨α‰΅

αŒ₯αˆ«α‰΅αŠ“ α‰³αˆ›αŠαŠα‰΅ αˆ˜αˆˆα‹«α‰½αŠ• αŠα‹α’
α‰³αˆαˆ«α‰΅ α•αˆŒα‰΅ αŠ₯αŠ“ αŒ„ α‰¦αˆα‰΅ αŠ α‰…αˆ«α‰’
πŸ‘‰CONCRETE CRACK

🚧1. Shrinkage Cracks (plaster, concrete, mortar)

β€’ Proper curing during and after construction.
β€’ Apply crack filler putty or polymer modified mortar.
β€’ For hairline cracks, use wall putty repainting.

🚧2 . Thermal Cracks (due to expansion/contraction)

β€’ Provide expansion joints in long walls/slabs.
β€’ Use materials with low thermal movement.
β€’ Fill cracks with elastomeric sealants (flexible materials that expand/contract).

🚧3 . Crazing Cracks (fine hairline, network pattern)

β€’ Usually surface-level, no structural danger.
β€’ Improve curing methods to avoid rapid drying.
β€’ Apply a thin coat of plaster or skim coat paint.

🚧4. Map Cracking (surface cracks in plaster/concrete)

β€’ Remove loose plaster and re-plaster with proper mix.
β€’ Ensure correct water-cement ratio.
β€’ Use sulfate-resistant cement in areas prone to chemical attack.

🚧5. Settlement Cracks (minor, not structural)

β€’ Fill with epoxy putty, crack filler, or cement mortar.
β€’ If soil settlement is minor, monitor for further movement before repair.

🚧6 . Moisture/Leakage-Induced Cracks

β€’ Seal cracks with waterproofing compounds.
β€’ Apply polymer-modified mortar or PU injection for waterproofing.
β€’ Ensure proper drainage and damp-proofing to prevent recurrence.

🚧7. General Hairline Cracks (paint-level cracks)

β€’ Fill with acrylic crack filler or wall putty.
β€’ Sand smooth, then repaint with flexible paint.

@etconp
❀10πŸ‘5
πŸ‘‰Effective Depth (d) Requirements

πŸ’«The Effective Depth (d) is a calculated value, not a minimum requirement, and is used directly in all strength equations.

🚧1. Calculation of Effective Depth

⏺The effective depth is calculated based on the overall geometry of the section:

❇️d = D - Effective cover

🎲Where D = overall depth of the member

πŸ”°Effective Cover = Clear Cover + Stirrup/Link Diameter + (Main bar Diameter) /2

πŸ“To prevent noticeable deflection, the calculated L/d ratio must be less than the modified basic ratio.

⏺For example, for a simply supported beam with a 5m span, the minimum effective depth required for deflection control would be:

🌟d min =span/20 = 5000mm/20 =250 mm

@etconp
❀10πŸ‘2
Qorannoo_Gabaa_galteewwan_ijaarsaa_Marsaa_2ffa_Bara_201822222.pdf
18.9 MB
πŸ‘‰α‹¨2018 α‹“.ም 2αŠ› ሩα‰₯ α‹“αˆ˜α‰΅ α‹¨αŒαŠ•α‰£α‰³ αˆ₯αˆ«α‹Žα‰½ የቀαŒ₯α‰°αŠ› α‹‹αŒ‹ (Direct Cost) αŒ₯αŠ“α‰΅ αˆ°αŠα‹΅

πŸ’«Oromia Construction Authority (OCA)

https://t.me/ETCONp

@ETCONpWORK
πŸ™11❀4πŸ‘2πŸ‘1
πŸ‘‰Addendum vs Amendment β€” What’s the Difference?

πŸ’«Quantity Surveyors, we often deal with contract documents, tender clarifications, and revisions.

🚧Two common terms we see are Addendum and Amendment, and although they sound similar, they serve different purposes.

⭐️Addendum

➀ Issued before the contract is signed.
➀ Used to add, clarify, or modify tender documents (like drawings, BOQ items, or specifications).
➀ Example: β€œAddendum 02 – Revised ceiling layout and updated quantities.”

⭐️Amendment

➀ Issued after the contract is signed.
➀ Used to change the terms, price, or scope of an existing contract.
➀ Example: β€œContract Amendment No.1 – Addition of new partition works.”

⏺Addendum:-Before contract
⏺Amendment:-After contract

πŸ“Understanding this helps in proper documentation, variation handling, and clear communication with clients and consultants.

@etconp
πŸ‘19❀9
πŸ‘‰Here’s a detailed explanation of a Site Engineer’s responsibilities during staircase construction β€” from preparation to finishing work:

🧱 1. Planning and Preparation
Study the drawings: Review architectural and structural drawings to understand the staircase dimensions, type (dog-legged, open-well, spiral, etc.), reinforcement details, rise and tread measurements, and finishes.

⏺Check levels: Verify the floor-to-floor height and coordinate with the formwork and reinforcement plans.
⏺Material preparation: Ensure all materialsβ€”cement, sand, aggregate, steel bars, formwork boards, and binding wireβ€”are available on site before work starts.

πŸ“ 2. Layout and Marking
Set out staircase dimensions: Mark the staircase position on the site using a tape, level, and plumb bob according to the approved drawings.

⏺Verify rise and tread: Confirm that each step’s rise (height) and tread (depth) are consistent and meet the design or building code requirements.
⏺Mark landing positions: Ensure correct landing levels and alignment with beams or slab edges.

🧰 3. Formwork Supervision
Check shuttering quality: Ensure formwork is strong, well-supported, and properly aligned to achieve accurate step dimensions.

⏺Prevent leakage: Seal joints to prevent cement slurry leakage during concreting.
⏺Safety checks: Confirm all supports and props are stable, especially at higher elevations.

πŸ”© 4. Reinforcement Work
Inspect reinforcement placement: Ensure main bars, distribution bars, and landing reinforcement are fixed according to the drawing.

⏺Maintain cover: Verify concrete cover blocks are in place (usually 20–25 mm for stairs).
⏺Check bar bends and laps: Confirm correct bending of bars at landings and overlaps at junctions with slabs or beams.

🧱 5. Concreting Supervision
Monitor concrete mix: Check mix proportion (as per design or site mix) and ensure workability for proper compaction in steps.

⏺Vibration: Ensure adequate vibration without disturbing the formwork or causing honeycombing.
⏺Finish: Smooth the step surface immediately after concreting, maintaining rise and tread accuracy.

🧊 6. Curing and Formwork Removal

⏺Curing: Ensure the staircase is properly cured (minimum 7 days for normal cement) to prevent cracks.
⏺Formwork removal: Supervise careful removal of formwork after sufficient strength gain, starting from steps and then landings.

🎨 7. Finishing Work
Plastering or tile laying: Check line, level, and alignment during plastering or installation of stair tiles, granite, or terrazzo.
Railing installation: Ensure railing is fixed firmly, maintaining required height and aesthetics.
⏺Final inspection: Verify overall finish, safety, and dimensions before handing over.

πŸ“‹ 8. Documentation and Coordination

⏺Maintain daily progress reports and quality checklists.
Coordinate with architects, structural engineers, and contractors for any design clarifications or site modifications.

⏺Ensure safety compliance for workers during construction at heights.

@etconp
❀13πŸ‘Œ4
πŸ‘‰αˆ°αˆ‹αˆ ውዡ α‰€α‰°αˆ°α‰¦α‰»α‰½αŠ•

πŸ’«α‰₯α‹™ αˆ°α‹Žα‰½ የ Thesis αŠ₯αŠ“ Internship αˆ³αˆα•αˆŽα‰½ αˆ‹αŠ©αˆαŠ• α‰₯αˆ‹α‰Ήα‹‹αˆ

πŸš§αˆ΅αˆˆα‹šαˆ… α‹›αˆ¬ የ Thesis αˆ³αˆα•αˆ αŠ₯αŠ•αˆˆα‰…αˆ‹α‰Ήα‹‹αˆˆαŠ• ነገ α‹°αˆž Internship αˆ³αˆα•αˆ αŠ₯αŠ•αˆαŠ­αˆ‹α‰Ήα‹‹αˆαŠ•πŸ™ πŸ‘‡

@etconp
πŸ™5❀2
THESIS_ON_BUILDING_DESIGN,_EXCEL.pdf
10.2 MB
FOR THOSE OF YOU DOING YOUR THESIS (SENIOR ESSEY) IN STRUCTURAL DESIGN THIS FILE IS HELPFUL. IT ENCOMPASSES:

1. SOLID, RIBBED, FLAT AND WAFFLE SLAB DESIGN AND COST COMPARISON

2. DOG LEGGED, OPEN NEWEL & FREE STANDING STAIR ANALYSIS AND DESIGN

3. EXCEL TEMPLATE PREPARATION FOR 11 TYPES OF STAIRS

4. EXCEL TEMPLATE PREPARATION FOR NON-RECTANGULAR SLABS SUCH AS TRAPIZOIDAL SLAB AND SUCH.

5. MOMENT COEFFICIENT PREPARATION FOR TRAPIZOIDAL SLAB

6. ANALYSIS AND DESIGN OF 2B+G+M+15 OFFICE BUILDING

PART OF IT WAS PUBLISHED IN THE JOURNAL OF ETHIOPIAN CIVIL ENGINEERING ASSOCIATION

I HOPE IT IS HELPS!

https://t.me/ETCONpWORK

@etconp
❀9πŸ‘5