 |
| Fig-Barbade Wire Tie |
Form-work and Reinforcing in Underground Cable Installation Civil Work
The steel reinforcing bars shall be in
the form of round or deformed bars and shall be made by approved manufacturers
in accordance with the requirements of B.S. 4449, B.S 4461 and B.S. 4483 as
applicable and bent to comply with B.S. 4466. The minimum bar size to be used
shall be 8 mm
diameter. Welding of bars for extensions shall not be permitted. Bend tests
shall be carried out on site to cheek the quantity of rebar.
How Binding Wire?
Metal reinforcement is to be secured
against displacement by using N. 16 SWG annealed iron wire ties or suitable
clips at inter-sections. Tails of all wire ties shall be bent away from
adjacent concrete surfaces. All rebar shall be held rigidly in place so that it
cannot move during concreting.
Storing Procedure
All reinforcing bars shall be stored on
the site on timber supports at least 200 mm clear of the ground.
Fixing Technique
The number size form and position of
all the reinforcement shall unless otherwise directed or authorized by the
Engineer be strictly in accordance with the Contractor’s approved drawings.
Nothing is to be allowed to interfere with the disposition of the reinforcing
bars and the Contractor is to make a particular point of seeing that they are
placed correctly in every respect. The minimum cover to any reinforced bar shall
be at least 75 mm
when below ground.
Sponsored:
How take Preparation?
Striking
Sponsored:
Cleaning System
All reinforcing steel shall be free
from heavy rust loose scale oil and grease or other deleterious material
immediately before the concrete is placed in forms.
How Take Approval?
The Contractor must obtain the written
approval of the Engineer to the reinforcement when placed before any concrete
is placed.
CIVIL WORK & FORMWORK
Formwork shall include all temporary
moulds for forming the concrete to the required shape.
Construction Works
Timber forms shall be constructed of
sound well seasoned timber or prefabricated steel forms may be used.
The formwork shall be fixed in perfect
alignment sufficiently rigid and strong and securely braced so as to be able to
withstand without appreciable displacement deflection or movement of any kind
the weight of the construction and the movement of persons, materials and
plant. All joints are to be grout tight to prevent leakage of liquid from the
concrete, wedges and clamps are to be used wherever practicable.
All forms shall be aligned to a
tolerance of ± 3mm.
How take Preparation?
Before any concreting is commenced
forms and centering shall be carefully examined and the space to be occupied by
the pour thoroughly cleansed out. The inside of forms shall be treated with a
coating of an approved substance to prevent adhesion and the forms shall be
thoroughly wetted shortly before concreting is commenced.
No concreting shall be commenced in any
portion of the Works until the preparations have been approved by the Engineer.
Striking
Forms shall be removed in such a manner
as will not injure the concrete and no formwork until the concrete has
sufficiently set and hardened.
Damage Concrete
The Contractor shall make good at his
own expense any injury to the concrete work and any damage caused by or arising
from the removal and striking of forms and supports. The attention of the
Engineer must be drawn to any damage so caused and no repair work carried out
without the prior approval of the Engineer.
No comments:
Post a Comment
WAZIPOINT:
Thank you very much to visit and valuable comments on this blog post. Keep in touch for next and new article. Share your friends and well-wisher, share your idea to worldwide.