G-5 Install Reinforcement Flashcards
Anchor bolts
used to make connections between framing and concrete members. provide lateral stability against earth quakes, uplift from wind.
Pipe sleeve
Pipe leaves leave a portion of the bolt free of concrete so that location may be adjusted after casting
Protection of anchor bolts
protect threads with tape during pour
Dowels
short pieces of rebar used to connect two separate cast-in-place concrete sections. can be smooth or deformed rebar. can also be inserted by hand after concrete is poured *make sure not to go through into soil.
Penetration od dowels
if not specified by engineer multiply diameter of bar by 24 then multiply that by 2.
fo is rebar is 12mm in diameter go
12 x 24 = 288
then
288x2 = 576mm
Rebar
added to increase tensile strength is foundations, columns, beams, slabs and other concrete members.
why is steel rebar perfect for concrete
because steel and concrete expand and contract at the same rate.
Lapping rebar
unless specified by and engineer, bar should be lapped at least 24 bar dimensions over the last bar.
Bending rebar
either purchased pre bend or done onsite with a rebar bender (big red)
Smooth dowels
Expansion joints use smooth dowels to keep slabs in alignment. the dowels hold both slabs in place vertically but allow them to move horizontally.
Anchorage
embedded metals are anchored to concrete by deformed rods, bolts or bent bars. these anchors are welded to the back of the metal components.
Edge projection
angled metal lates are used to protect edges of loading docks, doorways or on exposed corners.
Weld plates
pre cast construction methods use weld-plates to connect sections. plates embedded in footings and embedded in wall section are welded together after being placed.
Inserts
size and holding capacity is designed for the load that that are supporting.
strength of insert depends on/
how well the concrete is consolidated around it.
Tee bar ceiling hangers
used for suspended ceiling hangers in commercial building where suspended slabs are flooring systems.
Loop inserts
used to support heavy loads. lifting rings are used to move precast concrete.