Construction with MIVAN
A) PRE – CONCRETE ACTIVITIES
a) Receipt of Equipment on Site – The equipments is received in the site as ordered.
b) Level Surveys – Level checking are made to maintain horizontal level check.
c) Setting Out – The setting out of the formwork is done.
d) Control / Correction of Deviation – Deviation or any correction are carried out.
e) Erect Formwork – The formwork is erected on site.
f) Erect Deck Formwork – Deck is erected for labours to work.
g) Setting Kickers – kickers are provided over the beam.
After the above activities have been completed it is necessary to check the following.
- All formwork should be cleaned and coated with approved realize agent.
- Ensure wall formwork is erected to the setting out lines.
- Check all openings are of correct dimensions, not twist.
- Check all horizontal formwork (deck soffit, and beam soffit etc.) in level.
- Ensure deck and beam props are vertical and there is vertical movement in the prop lengths.
- Check wall ties, pins and wedges are all in position and secure.
- Any surplus material or items to be cleared from the area to be cast.
- Ensure working platform brackets are securely fastened to the concrete.
B) ON CONCRETE ACTIVITIES
At least two operatives should be on stand by during concreting for checking pins, wedges and wall ties as the pour is in progress. Pins, wedges or wall ties missing could lead to a movement of the formwork and possibility of the formwork being damaged. This – effected area will then required remedial work after striking of the formwork.
Things to look for during concreting:
i. Dislodging of pins / wedges due to vibration.
ii. Beam / deck props adjacent to drop areas slipping due to vibration.
iii. Ensure all bracing at special areas slipping due to vibration.
iv. Overspill of concrete at window opening etc.
POST – CONCRETE ACTIVITIES
i) Strike Wall Form- It is required to strike down the wall form.
ii) Strike Deck Form- The deck form is then removed.
iii) Clean, Transport and stack formwork
iv) Strike Kicker Formwork – The kicker are removed.
v) Strike wall – Mounted on a Working Platform the wall are fitted on next floor.
vi) Erect Wall – Mount Working Platform and the wall is erected.
Normally all formwork can be struck after 12 hours.
The post-concreting activities includes:
All components should be cleaned with scrapers and wire brushes as soon as they are struck. Wire brush is to be used on side rails only.
The longer cleaning is delayed, the more difficult the task will be. It is usually best to clean panels in the area where they are struck.
There are basic three methods recommended when transporting to the next floor:
i. The heaviest and the longest, which is a full height
of wall panel, can be carried up the nearest stairway.
ii. Passes through void areas.
iii. Rose through slots specially formed in the floor slab for this purpose. Once they have served their purpose they are closed by casting in concrete filter.
Once cleaned and transported to the next point of erection, panels should be stacked at right place and in right order. Proper stacking is a clean sign of a wall – managed operation greatly aids the next sequence of erection as well as prevents clutters and impend other activities.
Erecting Formwork for