Plinth beam work procedure - checklist, protection

Plinth beam work procedure - checklist, protection

1. PLINTH BEAM WORK PROCEDURE - CHECKLIST,
PROTECTION

What is a Plinth Beam ?

From the architectural and engineering point of view, plinth
work is the most important activity in . building construction.
All the peripheral and internal room dimensions are to be
checked at this stage of the work and offsets and projections of
the building are to be confirmed.

The efficiency and accuracy of the engineer-in-charge is judged
at this level. Mistakes committed at plinth level cannot be
rectified at a later stage.






Therefore, during plinth work maximu is expected of all the
personnel concerned.

2. Generally, project buildings are divided in two parts.

(a) Parking side
(b) Plinth side

In parking, the place is kept vacant for vehicular movement.

While in plinth, residential construction is planned. Hence, all
plinth work is to be completed before taking any R.C.C. work
above the plinth area.

The plinth work involves the following :

Casting of columns upto plinth level.

Constructing rubble/brick masonry upto plinth level.

Casting of plinth/tie beams at designed level.

Anti-termite treatment in foundation.

Refilling of column pits and plinth with selected material.

Soling over the compact refilled material.

D.P.C. over plinth walls.

Floor P.C.C.

3. Plinth protection.

In this chapter, we shall study the procedures for execution and
the precautionary measures to be taken during execution.

CASTING AND CHECKING OF COLUMNS UPTO
PLINTH

After casting of footings, mark the centres of respective columns
on the footing.

Erect the column cage by checking the number of bars, diameter
of bars, spacing and type of links (rings).

Provide the length of column bars upto the beam level,
considering the appropriate lap length of the bars.

Cast the column upto plinth level or upto the bottom level of
tie/plinth beam.

Check the proper covering for column reinforcement.

Check the unsupported height of column for slenderness, from
footing top to bottom of the beam. If the height is beyond limits,
inform the Structural Consultant and provide an intermediate tie
beam.

Check the offsets of column as per the drawing.

4. Check the mix before casting.

Maintain proper water-cement ratio.

Compact the concrete by needle vibrator.

CASTING AND CHECKING OF PLINTH TIE BEAMS

Plinth level is first finalized with respect to parking ground
level.

Plinth beams can be cast by adopting the usual procedure of
propping and shuttering.

Tie beams may be cast on masonry work at the plinth level.
Only side shuttering and supports are required in this case.

Bottom of peripheral plinth beam should be on kept 15cm below
the existing ground-level and necessary plinth masonry should
be done above the beam.

CHECKLIST FOR PLINTH TIE BEAMS
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