What is a drophead in construction?
A drop-head unit for supporting shuttering members used in the construction of concrete floors and/or ceilings which is movable between supporting and stripped positions along a shank.
What is slab formwork?
Modular and beam formwork, waffle and aluminium forms for concrete slab construction. All kinds of applications are covered: large slabs, solid and lightened, inclined, drop beams, infillings, column heads, cantilever beams etc. Excellent concrete finishes and safety standards guaranteed for workers.
What is structural shoring?
Shoring is the process of temporarily supporting a building, vessel, structure, or trench with shores (props) when in danger of collapse or during repairs or alterations. Shoring comes from shore, a timber or metal prop. Shoring may be vertical, angled, or horizontal.
What are requirements of Form work?
Requirements of good formwork:-
- It should be adequately strong to withstand an extensive variety of dead and live loads.
- It should be inflexibly built and efficiently propped and supported to hold its shape without undue deflection.
- The joints in the formwork should be tight enough to prevent leakage of cement grout.
What is sloping in excavation?
Sloping (Sloping system) means a method of protecting employees from cave-ins by excavating to form sides of an excavation that are inclined away from the excavation so as to prevent cave-ins.
What is Needle shoring?
Needle shoring is a colloquial term used to describe a series of steel beams that are inserted or “needled” perpendicularly through a wall and then supported vertically down to a base such as the ground or temporary footing or spreaders (Figure 3, page 17 ).
What is sheeting and shoring?
Sheeting and shoring are typically used at construction sites in order to provide temporary support of soil and existing structures. Sheeting consists of complete systems of shoring driven or vibrated into the soil with no lagging required.
What is open timbering?
The usual method of setting timber or steel supports in mines–they are spaced from 2 to 5 ft (0.6 to 1.5 m) apart, with laggings and struts to secure the ground between each set. The method is used in ground that does not crumble or flow.
What are four different types of slab?
Concrete Slab Types – Construction, Cost, and Applications
- One-Way Slabs on Beams.
- One-way joist slab (Ribbed slab)
- Waffle Slab (Grid slab)
- Flat Plates.
- Flat Slabs.
- Two-way Slabs on Beams.
- Hollow core slab.
- Hardy Slab.
What are slabs used for?
A slab is a structural element, made of concrete, that is used to create flat horizontal surfaces such as floors, roof decks and ceilings. A slab is generally several inches thick and supported by beams,columns, walls, or the ground.