Friday, 30 June 2017

ALUMINIUM FORMWORK : REMOVAL OF FLAT WALL TIE & WALL TIE SLEEVE

Flat wall Ties are used for the purpose of ensuring the thickness of the walls and column are consistent. Flat wall ties are to be removed by using special called Wall tie remover / extractor.

Subsequently, proceed to remove the wall tie sleeve which is embedded in the walls and columns section by using nose player.

Tuesday, 27 June 2017

ALUMINIUM FORMWORK : DISMANTLING OF SLAB FORMWORK

1. The appropriate time for the stripping of formwork panels will vary according to the environment and type of concrete used. The formwork panels of the slabs section are usually dismantled after 36 hours. However, this process shall subject to approval of the project structural engineer after taking into consideration the grade of concrete used, additional props stand ordered, etc.

2. The Aluspans mid beams / end beams have to be removed first after dismantling the wall panels. Proceed by removing the long pins and wedges on the joint bars for the end and middle beams. However, the prop lengths are to remain undisturbed during this process to lend support for the weight of the concrete slab.

3. There shall be 2 sets of prop lengths to support the concrete slab. the first set of the prop stands will only be removed when the assembly of the third level/floor commences and also upon approval and consultation with the project structural engineer. 

4. Proceed to dismantle the slab panels by commencing from the end of the slab area. Once the slab panels are dismantled, continue to remove the slab corners.

ALUMINIUM FORMWORK : DISMANTLING PROCESS OF WALL, COLUMN & BEAM FORMWORK

1. Formwork panels shall be removed without damaging the concrete. Reinforcement Bars or other tools shall not be used as a lever against the concrete in removing the formwork panels. Only panel puller shall be used for removing the wall panels. 

2. The appropriate time for the stripping of formwork panels will vary according to the environment and type of concrete used. The formwork panels of the wall, column and beam section can be usually dismantled after 12 hours. However, this process shall subject to approval of the project structural engineer after taking into consideration the grade of concrete used, additional props stand ordered, etc. 

3. Always ensure that the wall section panels are removed first follow by the column and beam sections. 

4. For precautionary step, ensure that formwork panels are removed systematically and due care is to be taken to prevent any damages to the formwork panels and also finish surface of the concrete whenever possible. 

5. For safety reason, ensure that no workers are facing the pin and wedges when removing using hammer. Pin and wedges removed are to be collected and placed in containers to minimize lost and replacement. 

6. The dismantle formwork panels shall be transferred to the next level/floor for subsequent assembly process via the slab opening or staircase areas in an orderly manner and to the appropriate section/area immediately. This will eliminate the confusion and congestion in the dismantling area or level as a result of too many dismantled formwork panels lying on the floor area. 

7. As the formwork panels are pre-numbered and if colour identification scheme is implemented, the transfer of panels can be determined and planned ahead according to the various sections/areas of one level/floor to the subsequent level/floor. 

8. Always ensure that all the formwork panels are to be properly cleaned and applied with the form release agent to protect the surface of the formworks before re-used. 

9. For the external wall section, the Starter Block (kickers) on the upper portion of the floor level shall remain intact to support and align the next level/floor of formwork panels that are going to be assembled. The assembly of the external formwork panels can be done by using the external working platforms that are fixed to the wall areas.

Sunday, 18 June 2017

ALUMINIUM FORMWORK : Concreting Process

Pre-Check Before Concreting

1. Ensure that the position of the walls and column formwork are in accordance with the set up marking.

2. Check to ensure correct spacing of props for slab formwork. 

3. Check the verticality and horizontality level of the wall and slab panels respectively. 

4. Ensure that all pins, wedges and ties are properly secured and tightened. 

5. Re-check the opening such as door and window panels are correct. 

6. Re-check all popping stands to ensure its height are in accordance to drawings. 

7. Adequate bracing (if necessary) to ensure stability. 

8. Ensure cover blocks are placed correctly. 


Monitoring During Concreting Process 

1. Ensure site coordinators are available and on stand-by during the concreting process. 

2. Always ensure that concrete pouring is disturbed evenly throughout the wall sections before commencing to cast the slab level areas. This is to prevent loading pressure on the formwork panels due to uneven casting.

3. Re-check the areas whenever cement slurry leakage is noted to determine the cause of it. Remedy work should be done immediately to ensure the concreting process is not affected. 

4. During concreting, always ensure that immediate steps is taken to remove/clean all the access concrete that is stuck on the back of the formwork panels. Non removal will result in the formwork panels getting too heavy and also the scrapping task after the concrete has dried up becomes more tedious.

Friday, 16 June 2017

ALUMINIUM FORMWORK : Identification of Formwork Assembled

1. A numbering sequence / stenciling shall be given for each panel and is identified in accordance to unit area such as Living rooms, Kitchens, Bed rooms, Bathrooms, Common areas etc.

2. Colour identification scheme while numbering on each section or area will also eliminate the confusion that may arise due to the size. It can be identified such that Blue is for Room 1, Red is for Room 2, Green is for Living area etc.

3. By practicing the use of numbering system in combination with the colour identification scheme, it have been proven to avoid confusion and assist in the process of identification of panels position once they are transferred to the next level/floor. 

Wednesday, 14 June 2017

ALUMINIUM FORMWORK : Assembly of External Working Brackets

1. External working platform brackets are used to provide a work area at the external wall section. 

2. Once the first level is completed and external fromwork panels are removed, fix the external working brackets to the first floor level at position slightly below the kickers which are fixed on first floor external slab. 

3. The external working brackets are secured to the external wall section from the inside using tie rods, nuts and bolts. 

4. Once all the external working brackets are put in place, timber planks and strips are placed on the floors and railings respectively to create an external working platform for the assembly of the subsequent level of the external formwork panels and kickers. 

5. Another set of external working brackets are later fixed on the subsequent level using the method as prescribed above. 

6. Once the subsequent level of external formwork panels are fixed, the external working brackets at one level below are removed and moved to the subsequent level. This process is repeated until the completion of the subsequent floors.

Monday, 12 June 2017

ALUMINIUM FORMWORK : Assembly of Beam & Slab Formworks

1. Fix the slab corner on top of the wall panels with round pins and wedges. The position of the pins should be from top down to ease the dislodging process.

2. The prop length and prop head is to be connected together for beam and slab support.

3. Alu span mid beam and Alu span cantilever end beam are connected to the Slab prop head using Beam Splice Bars. They are connected together by long pins and wedges at bottom section.

4. The Alu span mid beam sections are accurately position to enable the slab panels to be connected systematically.

5. Commence to assemble the slab panels from the corner section of the slab. Subsequently, fixed the whole slab area by pinning the slab panels together with the Alu span mid beam. 

Sunday, 11 June 2017

ALUMINIUM FORMWORK : Assembly of Wall Formworks


1. Always commence wall erection from the external corner of the wall section to ensure both joint external corner wall panels will support each other for standing position. Pin and wedges are to be used to secure the panels together. Always insert the pin from the inside out for easy removal of pin after concreting. 

2. The formwork panels wall positioning is securely placed on the marked gridlines and level by way of fixing timber stoppers at the base of the outer side of the formwork panels at interval of 1 m. This would ensure that the formwork panels are not disposition during the concreting process. 

3. Once the initial wall corner panels are assembled, place the wall corner panels on the allotted set up position. 

4. Commence to erect simultaneously the balance of the wall panels from either side of the external wall panel. 

5. Proceed to assemble the internal wall corner. Place these panels into the correct position on the lines which were set up by the surveyor. Proceed to assemble the balance of the internal wall at both sides. 

6. The internal and external walls are to be held together by flat wall tie with wall tie sleeve and PVC cover. These wall tie sleeve and PVC cover are to be cut for the exact length of the wall thickness. Flat wall tie are to be coated with the Form Oil before each usage. 

7. To determine and achieve the vertical accuracy of the formwork panels assembled before concreting process, several methods such as plumb bob, spirit level, theodolite equipment etc can be used. The simplified method of using a plumb bob with a string attached to it which is then suspended from the upper part of the formwork panels is used as a guide to determine the deviation from the vertical alignment of the panels.

8. Additional wall panels or starter blocks (kickers) are fixed on the external wall panels in accordance to the required height for the formation of the slab concrete. Check to ensure that the verticality of the Starter Blocks (kickers) is correctly aligned. 

9. The Starter Blocks (kickers) shall remain at its position for the subsequent forming of next level wall.

Saturday, 10 June 2017

ALUMINIUM FORMWORK : Installation of Works of Rebar, M&E & Plumbing

(1) The support works such as rebar, Mechanical & Electrical (M&D) and plumbing are to commence immediately once the set up is done. The same is to be ensured before installing the aluminium formwork. 

(2) The support works for the slab section commence after the slab formwork panels are assembled.

(3) Cover blocks should be fixed on both sides of the rebar section for positioning and eliminate the rebar from resting on the surface of the formwork panels. 

(4) Positioning of outlets for Electrical switch boxes to its correct alignment can be done by riveting the appropriate fit size mould to the formwork panels. The electrical switch boxes are then securely cap to the fit size mould and fasten by way of wiring to the formwork panels. Ensure that it is properly secured to prevent grouting from building up in the switch boxes.