Table of Contents
- 1 What do I need to know before casting a slab?
- 2 What do you check before casting slab and beam?
- 3 What should I look for when casting concrete?
- 4 How do you handle cement?
- 5 What is standard slab height?
- 6 How do you supervise concrete?
- 7 Are concrete slabs safe to work on?
- 8 How do you protect your skin when working on concrete?
What do I need to know before casting a slab?
Ensure that wooden pieces, paper, nails, etc. are removed from the beam before casting. Ensure that the shuttering, supporting, and the scaffolding are firm and proper. Ensure that all joints in the formwork are properly sealed.
What do you check before casting slab and beam?
Before casting a slab, all shuttering gaps must be properly closed giving particular attention to column cap, beam junctions, beam side to slab bottom junction and beam side to beam bottom junction as well as jointing between two plates.
What safety precautions should be followed when working with concrete?
Wear water-proof gloves, a long-sleeved shirt, full-length pants, and proper eye protection when working with these materials. If you have to stand in wet concrete, use water-proof boots that are high enough to keep concrete from flowing into them.
What precautions are to be taken before during and after concreting?
Precautions Before, During & After Concreting: If possible, mixer machine should be installed below the shade. 3. If concrete is to be transported to a longer distance, concreting materials may be mixed first in dry condition and the water may be included at the job site just before placing the concrete in position. 4.
What should I look for when casting concrete?
Inspection during Placement of Concrete….1. Concrete Pre-Placement Checklist.
| Sl. No | CHECKLIST | REQUIREMENT |
|---|---|---|
| 10 | Location of construction joint | |
| 11 | Water tightness of shuttering, if required | No water seepage allowed |
| 12 | Quality of water | Potable and clean |
| 13 | Measuring jar for water pouring | As per water content requirement |
How do you handle cement?
Handling cement
- Ensure cement bags are never dropped. They should be carefully placed on a flat, raised surface.
- Roll the cement bags over before lifting them.
- Do not carry cement bags at the ends.
- Ensure cement bags are never stored upright or on their side.
What precautions should be taken during mixing and casting concrete?
Mixed materials must be laid at the required site within 30 minutes after adding water to the cement. Care should be taken that in any case the mixed materials should not be dropped from a height greater than 1.2 meter in order to prevent segregation of coarse aggregate and mortar.
What precautions should be taken in construction joints?
Ensure that joints are fully filled with mortar leaving no voids. Joints should be raked and properly finished with trowel or float, to provide good bond. 7. A maximum of one metre wall height should be constructed in a day.
What is standard slab height?
As per the National Building Code of India 2005, the height of all rooms for human habitation shall not be less than 2.75 m measured from the surface of the floor to the lowest point of the ceiling (bottom of the slab). In the case of pitched roof, the average height of rooms shall not be less than 2.75 m.
How do you supervise concrete?
Falsework and temporary works. Formwork. Surface finish. Bibliography.
What are the precautions to be taken while casting a concrete slab?
Proper walkways/platforms shall be arranged so that the supports of the pipeline and manpower are not directly stand on reinforcement. Sufficient carpenters along with supervisor shall inspect the behavior of supports below the slab during the casting.
What are the precautions to be taken when casting a beam?
Formwork joints in beam sides should be taken at the end of beam. Before casting a slab, all shuttering gaps must be properly closed giving particular attention to column cap, beam junctions, beam side to slab bottom junction and beam side to beam bottom junction as well as jointing between two plates.
Are concrete slabs safe to work on?
From start to finish, concrete slabs have the potential to cause severe harm to those around them. While it’s important to know the basic safety precautions of working with concrete, the bare minimum is not enough. There are additional safety hazards to worry about, as dry and wet concrete can cause significant damages.
How do you protect your skin when working on concrete?
To protect your skin and eyes, wear alkali-resistant gloves, long sleeves and long pants to keep skin covered, waterproof boots, and eye protection. It is good practice to keep extra gloves and safety glasses at construction sites. When wet concrete makes contact with skin, it can result in severe chemical burns.