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Showing posts with label concrete wall. Show all posts
Showing posts with label concrete wall. Show all posts

Friday, August 2, 2019

How to set up windows in concrete wall

If the function of specific spaces is changed or lights are necessary in garages or basements, the windows should be installed in concrete wall. The work should be carried out in a perfect manner based on the relevant codes other than taking suggestions of a structural engineer so that the loads can be transmitted perfectly over the window throughout making opening, erection of lintels, and window installations.
The window installation process in concrete wall comprises different steps like indicating boundary of the window on the wall, arranging L- shape steel or building up reinforced concrete beam as a lintel, creating an opening inside specified boundary, smooth edge of the opening, placement of windows, and at the end deployment of water proving agent around the frame of the window.
Installation methods of Windows in Brick Masonry Wall
Forming Opening:
1. Prior to form opening, verify that the wall apart from opening is sufficient to sustain the load delivering to the structure.
2. Inspect different obstacles like buried utilities, shrubbery, indoor wiring and ductwork.
3. All the structural members standing on the walls with direct bearing over the area in which opening are created, should be perfectly supported with props to reduce the load from masonry wall unless the lintel over the opening can bear the load sufficiently.
4. The segment to be disassembled should be properly labeled on both sides of the wall.
5. Disassembling should be done from top to bottom inside the marked area.
6. The sides of the opening should be equivalent and perpendicular to the plane of wall.
Construction of Lintel:
1. The lintel should be constantly cast first in the opening made for the purpose.
2. One side of the shuttering should be uncovered initially till the concrete is placed.
3. The shuttering should then be secured for half of the opening and concreting is finished.
4. Curing of lintel casted should be kept for a minimum period of 7 days.
5. Sometimes, L-shaped steel beam may be applied as a lintel.
Installing Window:
1. Make a wood casing that is attached with the concrete opening with screw.
2. Frame the bottom shelf with an angle in order that the water striking the window will get away from it.
3. Flash the complete wood casing with the primer perfectly.
4. Install window in the flashed opening and provide sufficient space all around the window for insulation.
5. Fill that space with low expansion polyurethane spray foam.
6. In a concrete wall with no wood framing, install the window framework by fixing it into the concrete wall with self-tapping concrete screws.
7. For a block wall installation, fix with rust-resistant screws with a toe-nail method through the jambs into the head and sill boards at each corner.
8. Reduce the window into the framed opening, inserting the bottom window edge initially, then tipping in the top.
9. Shim the window from both the interior and exterior sides till it is level, square, and flush with the exterior side of the basement wall. Keep in mind that the window should not get damaed with extreme shim pressure.
10. Use expanding foam to the window frame gap created by the shims. Allow the foam to cure for minimum one hour before trimming the excess.
11. Use sealant around the window frame joint on both the exterior and interior sides.
How to set up windows in concrete wall

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Published By
Rajib Dey
www.constructioncost.co
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Friday, December 14, 2018

The construction process and benefits of cavity walls

Cavity wall stands for a double wall that comprises of two individual walls of masonry known as skins or leaves which are detached with an air space and connected jointly through metal ties at proper distances.

These walls are normally used as outside walls but sometimes used also as interior walls because of good sound.

Construction Methods of Cavity Wall

The two leaves of a cavity wall contain same thickness when it belongs to a non load bearing wall or the inside leaf becomes thicker as compared to exterior leaf to comply with the structural needs.

The interior and exterior skins of the wall are sufficiently knotted jointly with special wall ties involving minimum five ties per square meter of wall.

The cavity wall should not remain under 40mm nor over 100 mm in width.

A vertical damp proof course should be provided at window and door reveals so that moisture can not penetrate in the wall. The damp proof course should be adaptable.

Building Regulations For Cavity Wall
As per the norms of building codes, the double wall should be normally 265 mm or 275 mm thick and comprises of 102.5 mm interior and exterior skins and 60-70 mm cavity (sufficient for 2 storied domestic building).


The interior leaf should be raised to 215 mm or more in thickness encountering heavier load or floors. For stone faced buildings, the exterior leaf should be 103-206 mm and interior leaf should be 102.5 mm. The width of cavity in between differs from 50 – 70 mm.

Benefits of cavity walls

1. In these types of walls, there are no scopes for entering of moisture from the exterior wall to the interior wall.
2. The layer of air in the cavity does not transmit heat and minimizes the transition of heat from the exterior face to interior face.
3. It functions as damp barrier and lessens the cooling cost of the building.

4. The cost of building up a 275 mm cavity wall will be low as compared to build up a 328 mm solid wall.
5. It is inexpensive as compared to exterior or interior wall insulation.
6. It retains the thickness of the existing wall.
7. Minimum disruption is required for set up.
8. It can minimize condensation significantly.


The construction process and benefits of cavity walls

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Published By
Rajib Dey
www.constructioncost.co
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Monday, February 5, 2018

Why RC Structural Slabs and Beams are provided in plinth level

Given below, the detailed information on the importance of arranging RC structural slabs and beams at plinth level (GF-Finished Floor Level).

Wherever low/poor bearing capacity soils met with, the Architects and also certain Builders think and believe that If the bearing strength of soils become weak or low, RC Structural slabs & Beams may be arranged at plinth level (GF-Finished floor level) with the purpose of preventing settlement of foundation and subsequent development of cracks in walls.

By applying your own experience and expertise in foundation structure, it is possible to have clear idea on the behavior of weak bearing soil if loaded heavily. The foundation cost is raised by 50% with the inclusion of the cost of setting up RC Structural Slabs & Beams.

But the provision of RC structural slabs and Beams at plinth level may not be considered as useful solution to get rid of foundation settlement and subsequent cracks. Rather it will be treated as extra expenses that is incurred on the construction of structure.

It is recommended to apply the following measures to resist the settlement of foundation systems and wall cracks efficiently.

The foundation soil at a depth of 00 m to 2.70m (if it belongs to a weak bearing soil like soft/medium clay) should be artificially reinforced with Geogrids/Geotex layers supported with Quarry dust:Gravel Mix 1:3 or cement.

Quarry dust 1:10 mix in 4 or 5 layers of 200 mm thick will enhance the SBC of soil at 2.00m/1.80m level to 200kN/m2 from 100kN/m2.

Arrange an extra layer of Geogrid/Geotex over and then apply the PCC 1:5:10 for 100 mm. Over which the foundation system should be provided as designed-combined strip Raft/combined/isolated footings as per situation. Inspite, under reamed piles with pile cap may be arranged directly.

To get more details, go through the following link onlinecivilforum.com
Why RC Structural Slabs and Beams are provided in plinth level

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Published By
Rajib Dey
www.constructioncost.co
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Wednesday, December 7, 2016

Brief Demonstration Of Trio Wall

Formwork alias bekesting / mal / molds that is formed with wood, plywood, steel to develop the fresh concrete.

TRIO stands for the globally recognized formwork system for all applications where the primary objective is to minimize the times for shuttering by applying traditional DW tie technology. With the BFD coupler for virtually all connections and many other practical system solutions, TRIO has proved it’s worth in numerous projects all through the globe. TRIO is utilized simultaneously with the more innovative MAXIMO panel formwork. A wide array of accessories, like the BFD Coupler or MXK Bracket System, is applied in both systems.

Given below, some exclusive features of Trio
  • Panel formwork is very flexible for faster performance. Panel formwork supports MAXIMO panel formwork
  • Panel heights up to 3.30 m, panel widths up to 2.40 m (standard system)
  • Highest allowable fresh concrete pressure: 80 kN/m²
  • Compatible with DW 15 and DW 20 tie systems
  • Flush, aligned and firm connections with the BFD Alignment Coupler – along with filler timber compensations up to 10 cm
  • Easy cleaning operations because of the powder-coated frame

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Published By
Rajib Dey
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Friday, May 27, 2016

Elevator Shaft Reinforced Concrete Shear Wall Details

Elevator (lift) Shaft Reinforced Concrete Shear Walls detail is a CAD dwg drawing that contains “Π” shaped elevator shaft shear wall with primary and secondary column reinforcement.

There are various details in this drawing which range from main and secondary column reinforcement rebars, stirrups, links details, shear reinforcement. This template is very essential to save huge time in your projects. Dimensions of this elevator-lift shaft shear wall can be modified efficiently through some easy to follow CAD commands, spreading the middle light reinforced part of each shear wall devoid of modifying the main column reinforcements.

Other Elevator Shear Wall Details include the following :

– Elevator Shaft Pit Foundation Reinforcement Detail
Reinforced Concrete Column Supported on Mat ( spread ) Foundation
– Shear Wall Reinforced Concrete Column Reinforcement Details


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Published By
Rajib Dey
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Thursday, May 26, 2016

An Exclusive Animated Construction Video On Spider Tie Concrete Wall Forming System

This animated construction video specifically narrates Spider Tie Concrete House. Spider Tie is a recognized concrete wall forming system. It reduces heavy form as well as labor cost & time for construction. The Spider Tie system generates a temporary frame work through which you just affix your plywood with the use of a approved coarse thread screw. It has similar functionality with binding plaster to wooden studs. This framework can retain your re-bar correctly in place each time devoid of applying tie wire.


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Published By
Rajib Dey
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Saturday, October 3, 2015

Different phases for developing precast concrete wall

Tachydomi Sa presents a useful video that focuses on different phases of constructing precast elements required for developing reinforced concrete construction.

This video is specifically based on precast wall production phases.

Due to its extreme strength, precast concrete walls can easily combat with tornado/hurricaneand offers an extra level of gurantee for safety in areas exposed to severe weather.

Precast concrete construction process PDF - www.bca.gov.sg


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Published By
Rajib Dey
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