Study your flashcards anywhere!

Download the official Cram app for free >

  • Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off
Reading...
Front

How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key

image

Play button

image

Play button

image

Progress

1/27

Click to flip

27 Cards in this Set

  • Front
  • Back
A reinforced concrete wall is limited to a slenderness ratio of
25
The longitudinal reinforcing in a tied column is held in place by stirrups, commonly a No. 3 or No. 4.
false
Formwork is a permanent structure that supports its own weight and that of the freshly placed concrete as well as the construction live loads including materials, equipment, and workmen
false
For maximum strength, the direction of plyform grain in the face layers should be placed parallel to the span
true
The failure mode for a stud is crushing
false
Partially seasoned wood is used for formwork because it is the most stable. Fully dried lumber will warp and crack during hot weather, while green timber will swell excessively when it becomes wet
false
After the forms have been removed, shores are placed snugly under a concrete slab.
false
Inadequate bracing and vibration are causes of formwork failure.
true
In slab form design, the horizontally spanning members are assumed to be continuous beams and are therefore statically determinate.
false
Shores and mudsills must rest on frozen ground
false
??? hold concrete forms secure against the lateral pressure of unhardened concrete
Ties
??? or column clamps encircle column forms and hold them together securely.
Yokes
The applicable adjustment factors for allowable bending stress are load duration, wet service, size, flat use, temperature, and stability.
false
Two main factors that affect the design load/lateral pressure in concrete wall forms are
TEMPERATURE AND RATE OF PLACEMENT OF CONCRETE
List two job built form work components that behave like a beam
STRIGERS AND JOISTS, WALES
List two objectives of the form builder
QUALITY and SAFETY
Slab formwork is designed for nonuniformly distributed vertical loads
false
The definitive design specification for reinforced concrete in North America is the
ACI CODE
A major source of cracking in concrete is structural action
True
One way to resist cracking in concrete is to use
CONTROL JOINTS
Reinforced concrete beams subjected to bending moments develop cracks that extend almost to the ??? where the strain is zero
NEUTRAL SURFACE/AXIS
Why does concrete crack
LOW TENSILE STRENGTH
To ensure that wet concrete mix passes through the reinforcing steel without separation, the code specifies minimum ??? of steel bars.
spacing
• Over-reinforced beams have a ductile failure which is why the code specifies a maximum amount of tensile steel reinforcement.
false
For reinforced concrete beams, the stirrups are placed to resist cracks due to???
Shear
In reinforced concrete, the reinforcement is designed to resist ??? while the concrete is designed to resist ???
TENSILE FORCES/TENSION...COMPRESSIVE FORCES/COMPRESSION
• One of the reasons the coed specifies minimum concrete cover is to ensure that there is adequate bonding between the coarse aggregate and the steel reinforcement
false