G2 Flashcards
Fly Form
A form that is moved with a crane
Form Sheathing
3/4 lumber or plywood, with resin impregnated paper.
Stud
A upright member that support the from Sheathing.
Waler
Horizontal members that support the from Sheathing or studs.
Tie
Supports the walkers, load carrying ability of tie from 1500 for a quick tie to over a 30000 lb for a taper tie.
Wedge
Metal wedge are used to secure snap ties, wedges transferoad from ties to walkers and strong backs.
What is the usual spacing of a control joint?
Not more than 15 m apart
What is used to keep two walls together in as expansion joint
To keep the walls and alignment a key or grease down can be used
Where are control joints often placed?
Corners of windows, door openings
What is rustification
Ratification strip is actually part of narrowing of the wall to form a control joint, too rustification trips are placed opposite to one another two week in the wall,
What is the difference between an isolation joint and a control joint?
An isolation joint is a space between members that prevent cracking. A control joint controls random cracking
What is a control joint used for
To control random cracking
Why is the floor slab not cast directly on the footings?
To allow settling without cracking
What is the minimum depth of the control joint for a slab on grade.
1/4
What materials is used for a give and take strip?
Impregnated fiberboard
Describe three ways a controlled joint is in a slab on grade?
Tooled, zip strip, and surface cut after 24 hours of hearing
What species of grade of lumber would be a good choice for formwork
Fir/ larch but in residential SPF number two and better is used because it can be used inside the structure
What is calmly done to concrete forms before each to use
Lubricated with a product usually an oil that provides a form of release
List two kinds of ties that are stamped from steel metal?
Scrap ties and quick ties
Describe a taper tie
Key characteristic is the coil of wire that is forms the thread at both ends of the tie
Describe overlaid plywood
Form fly that has one face covered with a Reds and impregnated paper
What is the purpose of a reglet?
Counter flashing fits into the reglet and overlaps roofing material to form a water sight seal
Snap ties coming to basic types long end for double wall farm work and short and for single form work
The short formwork does not have the studs .
Which of the following processes does not cause cracks to appear on the
concrete surface?
a. incorrectly doing the joints when building a slab.
b. sprinkling a concrete hardener on the surface.
c. pouring concrete on a poor foundation.
d. inadequate concrete curing.
B
Which of the following is the most appropriate tool used by the cement
finisher for removing a superficial coat from a concrete surface with exposed
aggregate?
a. wood float
b. plastering trowel
c. wet canvas
d. water jet
d
