G-4 Slabs

Question 1

Suspended slab

Answer 1

suspended slabs is forming concrete in any type of multi-storey building

Question 2

Flat plate slab

Answer 2

simplest form of concrete slab, stays same thickness and when stripped no special features in soffit. its spans from support to support and relies only on its own strength and rebar to hold it up.

Question 3

Flat slab

Answer 3

columns that hold up this slab will have column capital or drop panels or both to help with shear forces.

Question 4

One-way slab

Answer 4

slab where there will be some sort of support from column to column. (steel running perpendicular to beams)

Question 5

Two way slab

Answer 5

load carrying steel runs in both directions

Question 6

One way ribbed slab

Answer 6

uses a series of metal pans secured end to end to the slab deck to create joists. pored all at once and can be quite thin

Question 7

Two way ribbed slab

Answer 7

series of metal dome pans are used and installed in a grid pattern. (waffle pattern after its been stripped)

Question 8

Slab band (ribbon beam)

Answer 8

slab bands do similar job as drop panels BUT they span continuously from column to column

Question 9

Girder

Answer 9

Girders span from column to column (post to post) and intermediate beams span between girders

Question 10

Spandrel beam

Answer 10

beam on perimeter os suspended slab.

Question 11

False work

Answer 11

supports the formwork, it also supports construction material loads.

Question 12

Falsework requires…?

Answer 12

Foundation
vertical and horizontal structural components
horizontal bracing
and diagonal brazing

Question 13

Difference between falsework and formwork.

Answer 13

falsework supports formwork and formwork moulds fresh concrete

Question 14

Single vertical shore

Answer 14

single vertical shore is a single 4x4 that is cut to fit and used as a vertical support. normally cut 1- 1.5 inches shy to allow for wooden wedges.

Question 15

Slenderness ratio

Answer 15

this is when the shore may require one or two horizontal bracings.

should not exceed 1:50 where 1 is the proportional to minimum cross sectional dimension and 50 is the unsupported height.

EXAMPLE: shoring up 18 feet. shores are rough cut 4x4s. convert feet to inches and then devide by 50
18x12=216

216/50= 4.32 4.32 is greater then the smallest dimension of the post (4x4 so 4) therefor you need lateral support

Question 16

Adjustable wooden shores

Answer 16

wooden shores that have jacks on the bottom that can go up or down.

Question 17

Ellis clamp

Answer 17

two wooden shores can be joined by ellis clamps.

Question 18

Steel shore

Answer 18

often telescopic and used as part of falsework. head of shore is used to accommodate stringer and has a adjustable shore jack.

Question 19

Scaffold shoring

Answer 19

Heavy duty and economical because of speed.

Engineer must approve design

Question 20

Beams bottom (wood forwork)

Answer 20

either T shore or double post shore