Rebar

Question 1

Check for this on Carnie Caps

Answer 1

-Depth of member
-quality of member
-Installed correctly?

Question 2

Rebar Impalement Cap Minimum Dimensions

Answer 2

4”X4” Square or 4.5” Diameter Circle

Question 3

Heat, Lot, batch numbers

Answer 3

Heat– refers to a specific melting operation for steel

Question 4

Lot

Answer 4

Lot–refers to a specific production run (150 Count for Splices)

Question 5

Batch/Group

Answer 5

batch–smaller than a lot, a subset of lot terms

Question 6

If any rebar goes over 20’ in height

Answer 6

It needs a temporary structure and is engineered by a PE

Question 7

Mill Certs For Drill and Bond Dowels

Answer 7

Need certs and own ASTM requirements

Question 8

Mill Scale

Answer 8

The bluish-grey coating formed after the production of steel

Question 9

Minimum Center-to-Center Spacing of Rebar

Answer 9

2.5X the diameter of the smallest dimension rebar (Bundled Bars have their own Requirements)

Question 10

Service Splice

Answer 10

Splice designed to withstand SERVICE LOAD

Question 11

Ultimate Butt Splice

Answer 11

Splice Designed for areas experiencing ULTIMATE LOADS
Will be found in critical areas (like columns)

Question 12

Splice Samples–>General Overview

Answer 12

Contractor’s QC Collects 4 from each lot (150 count)

Caltrans QA Collects sample 4 from first lot and then from every 5th lot

Additionally, Tests are needed for preliminary submittals

Question 13

Lap splice requirements #8 or smaller

Answer 13

45 diameters

Question 14

Do not lap splice

Answer 14

14 or #18 rebar, hoops, bars where minimum clear distance cannot be achieved

Question 15

Lap splice for #9, #10, and #11

Answer 15

60 diamters

Question 16

Rebar Diameter For #8 and smaller

Answer 16

1.0 in and then subtract .125” for ever size smaller

Question 17

How to read rebar

H
11
S
60

Answer 17

Producing Mill
Bar size
Type of steel (Should be W for Low-Alloy)
Grade 60 (Could have vertical lines to deliniate rather than showing)