Slab Formwork and Reinforcement Plan

8/9/2019 Slab Formwork and Reinforcement Plan

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Şef lucrări dr.ing. Eugen Lozincă

Catedra Construcii de Beton Armat

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SLAB FORMWORK AND

REINFORCEMENT PLAN

- Elaboration stages -


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I. FORMWORK PLAN

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It indicates the shape, dimensions and positions of thestructural elements that make up the slab.

It represents the plan view of the slab at the level of a

horizontal section through the vertical elements.

Sectioned elements (columns) should be hatched.

The vertical dimensions of the plate and beams are

indicated by cutting some transversal sections that are

then rotated into the plane of the slab. The horizontal

sections should be rotated downwards, while the vertical

sections should be rotated to the right.

It should show all dimensions that are necessary to

indicate the position of structural elements in respect to

the axes of the building.

It should show all the dimensions of the formwork panels

for plate, secondary and main beams.

The elaboration stages are:


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B.A. II

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1. Draw the AXES of the building

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2. Draw the COLUMNS (hatched)

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3. Draw the MAIN AND SECONDARY BEAMS

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4. Draw the ROTATED SECTIONS

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5. Name the columns and the beams

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6. Show the EXTERIOR DIMENSIONS

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7. Show the INTERIOR DIMENSIONS

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8. Show the ELEVATION MARKS

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II. REINFORCEMENT PLAN

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It is obtained by representing the reinforcement over theformwork plan. The interior dimensions are no longer

represented in order to clear the space.

In order to be viewed, the rebars are represented as

rotated in the plane of the slab. The rebars are represented in the same order they are

placed inside the formwork.


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The top rebars should extend on each side of the beamfor a distance of 1/4 from the largest adjacent clear

spans.

The inclined rebars start to descend at a distance of 1/5

from the respective clear span.

Distribution reinforcement, at least 4φφφφ6/m, has to beprovided perpendicular on the main reinforcement.

!!! At the top side of the slab, the distribution reinforcement will be provided

only in the zones where top main reinforcement is present (in order to create a

mesh of rebars)

l l

l l

l l

l l

Distribution rebars


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Top reinforcement, at least 5φφφφ8/m OB37, should beprovided perpendicular on the main beams in order to

resist the negative bending moments developed on the

long direction. It has to extend on both sides of the main

beam for a distance of 1/4 from the clear span on theshort direction of the slab.

DOWN

l

l

l l

l

l

TOP


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The dimensions of all straight segments of the inclinedrebars should be provided.

The slab reinforcement plan should also contain the table

of reinforcement that provides the main characteristics ofall the reinforcement marks: the diameter, the length and

the geometry of the rebar, the steel grade and the

number of identical rebars.

At the bottom side, the table of reinforcement has topresent the summation of the lengths of all reinforcement

marks for each diameter and the total quantity of

reinforcing steel.

45°

15

15

hp


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The elaboration stages are:

Table of reinforcement for slab – Level +4.15


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9. Draw the MAIN REINFORCEMENT

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10. Show the REINFORCEMENT MARKS

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11. Show the dimensions of the main reinforcement

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12. Draw the DISTRIBUTION REINFORCEMENT

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13. Show the positions and the marks of distribution rebars

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14. Table of reinforcement, materials quality, indicator …

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Slab Formwork and Reinforcement Plan