Discussion about Building Technology with Modern Science by MRH
Discussion on the use of columns, beams, and roof rods:
Implementation Figure: –
1st slab rod binding with LGED Primary School 4 storied foundation.
How to give lapping to the column or beam, how much to
pay these things are very important. Also,
you have to work according to the proper rules in giving extra top,
ring barrier, and ring in beam-column. Also, in the case of a slab,
you have to take care of the crank bar, extra top, etc.
I shared some rules for putting columns, beams, and rods
on the roof from the idea of different drawings of practical work.
However, some things may be different from drawing to drawing.
Ring barrier rule in the column:
Rings or tie bars are provided on both the sides of the column and
it will be thicker within L / 4 distance from the floor and ceiling
adjacent part, it should be maintained as per the drawing.
Spacing can be 3/4/5 inches (2.5 “provided)
The ring bar is placed in the middle of the column and
it should be placed less frequently outside the L / 4
distance from the floor and ceiling adjacent part,
it should be maintained as per the drawing.
Spacing may be 6/7/8 inches (provided 6 “)
Rules for beam ring barrier:
Rings or tie bars are provided on both the sides of the
beam and it will be thicker within L / 4 distance from
the adjacent part of the column, it should be maintained according to the drawing.
Spacing can be 3/4/5 inches (provided 4 “)
A ring or tie bar is placed in the middle of the beam
and it should place less frequently outside the L / 4
distance from the adjacent part of the column,
it should be maintained according to the drawing.
Spacing may be 6/7/8 inches (provided 6 “)
Extra top in case of beams:
The amount of extra top at the end of the beam is give as L / 4
The amount of extra top gives as L / 3 next to
the support in the middle of the beam
Extra bottom in the beam is give L / 7 or L / 8 away from the column
Rules for giving rod to the roof :
First, we need to know why we use rods on the roof or in different castings:
Why are iron rods use for roofing?
Concrete can only take the pressure.
Discussion about Building Technology with Modern Science
But it cannot take tensile strength, that is, concrete is brittle.
Therefore, iron rods are use with concrete to prevent tensile
strength in areas where concrete is prone to bending.
Because iron rods are strong, easy to weld. Can do,
easily available and cheap in price.
If the thickness is more than four inches, the roof rod is two
It should give in layers. Less than four inches,
for example, bathroom slabs/sunshades,
all this has to do in one layer.
Layers are call lattices in the conventional language.
Main rod and binder rod:
The main rod on the roof gives along the short direction
Binder rods give to the roof along the long direction
The main rod is outside the khachkar i.e. up and down
The binder rod stays inside the notch
Extra top on slab
The amount of extra top at the edge of the slab is giving up to L / 4
The extra top gives up to L / 3 on the support in the middle of the slab
Crank bar on slab:
The amount of crank at the end of the slab is L / 5
The amount of crank on the support in the middle of the slab is giving as L / 4
Note: These things are do according to the design,
so you have to work on drawing.
However, the above rules are use in most cases.