WOOD AND CONCRETE FLOOR SYSTEMS (BEAM AND SLAB) + STEEL REINFORCEMENTS

Beam

it is the structural member that supports the transverse load which usually rest on supports at its end.

• Simple beam

• Continuous beam

• Semi-continuous beam

• Cantilevered beam

4 Classifications of beams

Simple beam

a beam having a single span supported at its end.

Continuous beam

it is a beam that rest on more than two supports.

Semi-continuous beam

a beam with two spans

Cantilevered beam

it is a beam that is supported at one end or along its length.

Live Load

those movable loads imposed on the floor such as people, furniture and the like.

Dead Load

refers to the static load such as the weight of the construction materials which generally carry the live load.

Floor Joists

those parts of the floor system placed on the girder of beams where the floor boards are fastened.

Header of Trimmer

is a short transverse joist that supports the end of the cut-off joist at a stair well hole.

One way slab

the reinforcement of this slab runs only at one direction that is from beam to beam and additional reinforcements are also placed on the slab parallel with the beams perpendicular with the main reinforcements called temperature reinforcement.

Two way slab

this slab is supported on four sides where the floor panel is nearly square and is generally economical to employ the two directions of reinforcing bars placed at right angle with each other.

Corbel

structural wood that supports and attached the wood floor joist to the beam.

Bridging

a brace or an arrangement of braces fixed between floor joists to keep them in place.

Cantilevered slab

it is a slab that is supported at one end

Deformed Bars

it is a steel reinforcing bar which is manufactured with surface deformations to provide a locking anchorage with surrounding concrete.

Rebars

a steel bar having ribs to provide greater bonding strength when used as a reinforcing bar in a reinforced concrete

Stirrups

a reinforcement device to resist shear and diagonal tension stresses in beam.

• 20’ or 6.00 mts.

• 25’ or 7.50 mts.

• 30’ or 9.00 mts.

• 35’ or 10.50 mts. 

• 40’ or 12.00 mts.

Length of steel bars:

#2

What Bar No.

¼”, 6 mm

#3

What Bar No.

3/8”, 10 mm

#4

What Bar No.

½”, 12 mm

#5

What Bar No.

5/8”, 16 mm

#6

What Bar No.

¾”, 20 mm

#7

What Bar No.

7/8”, 22 mm

#8

What Bar No.

1”, 25 mm

#9

What Bar No.

1 1/8”, 28 mm

#10

What Bar No.

1 ¼”, 32 mm

#11

What Bar No.

1 3/8”, 36 mm

#14

What Bar No.

1 ¾”, 45 mm

#18

What Bar No.

2 ¼”, 57 mm