G5 Flashcards
Install anchor bolts and metal in concrete
What is a dowl?
short peice of steel used to connect two separate sections
How are L shaped anchor bolts placed when great accuracy is not needed?
stick in concrete after placement but before it sets (wet set)
What material is most bolt templates made of?
3/4 inch ply
What kind of forms used with dowels?
slab edge
what’s done to ensure uniform contact between the base of a machine and it’s concrete footing?
grouting
How can you protect anchor bolt threads during placement
wrap in tape or cover with heavy duty grease
What type of drawings used to find the exact location of machine bases bolts?
shop drawings
describe how-to make an expansion joint in a slab
smooth dowel in first, pour 1st, strip, fibre board , grease dowel, use expansion cap, pour 2nd
How are templates for anchor bolts positioned?
stringlines and gridlines
whats used to fasten pre cast concrete members together?
welding
list 2 types of inserts
tee bar and loop inserts
What 2 functions do anchor bolts provide?
holds building down and supports lateral movement
What kind of regret requires no cocking ?
pvc
What materials are manufactured reglets made from?
pvc &and metal
How are sewer covers held in place during concrete placement?
Held down by its own weight
why are trough forms held down with ballast?
to prevent the form from floating
How are trough forms held in position during concrete placement
ballast supported on brick and tied down or staked
What are sewer access covers and grates usually made from
cast iron
What material is used to shim manhole covers to elevation
metal shims
What are two methods of installing dock levelers?
pit mounted or cast in place
What can be done to support the forms from floating as the concrete is being placed
must be braced or weighted down
How are the forms held in place horizontally?
anchor the horizontal member by anchoring it to rebar with tie wire
what’s used to support the end of the conduit at the dock leveler?
templates
list 4 things to check prior to pouring concrete
level, square, to the right height, built in the right location
what type of anchor is used with a lag bolt?
expansion screws
stress plates are used to fasten __________
insulation
which fastener can be used with pressure-treated lumber?
tapcon blue screw
What type of glues are used with adhesive fasteners
epoxy
What fastening system allows pins to be attached to steel
powder actuated
what’s the main property of steel and concrete that allows steel to be used to reinforce concrete
similar coefficient or expansion
the compressive strength of concrete is about _________ times it’s tensile strength
10 times
what’s the size of 10M bar?
10mm in diameter
What name describes a grade 60 bar?
hard bar or hard rebar
What type of construction uses welded wire mesh for reinforcing concrete?
slab on grade
welded wire mesh is available in 6100mm long or rolls 61000 long. How wide is it?
7’ or 2288mm
in the description 254 x 254 x P13/P13 , what does P13 mean ?
the cross sectional area of the end of the wires will be 13mm
What does yield mean, as applied to reinforcing steel?
referring to the tensile strength or it’s bending point
list two types of waterstop
plain/dumbell and serrated
What pressures are waterstop designed to resist?
hydrostatic pressure
in what types of construction are waterstop used?
water tanks, sewage treatments, hydrolic structures
list three properties that all waterstops must have
waterproof, flexible, should be continuous around what you want to seal
what’s the widest waterstop that can be used for a 300mm wall
300mm
what’s the narrowest waterstop that can be used with concrete that has a max aggregate size of 30mm
6x30=180mm
what’s the most common type of doorjamb used in a concrete wall?
metal
wooden door Jamba are usually cast in place with __________ attached.
a reverse key attached
what’s added if door Jambs are not snug to both sides of the form
wood filler strips
how’s a metal door frame secured in an existing masonry opening?
hollow or solid fasteners
What keeps a door frame from moving before bricks or blocks are placed around it?
it’s braced
what’s to be done to keep concrete from leaking through the metal frame
use rubber stops
