751.4 Reinforced Concrete Design Properties - Revision history

Smithk: /* 751.4.1 Reinforced Concrete */ Per BR, minor clarifications related to barrier pay items

2020-08-05T14:12:40Z

751.4.1 Reinforced Concrete: Per BR, minor clarifications related to barrier pay items

← Older revision		Revision as of 09:12, 5 August 2020
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	\|width="20"\| \|\|Curbs and Parapets\|\|B-1		\|width="20"\| \|\|Curbs and Parapets\|\|B-1
	\|-		\|-
	\| \|\|~~Safety Barrier Curbs\|\|~~B-1		\| \|\|Type A, B, C, D, G and H Barriers\|\|B-1
	\|-
	~~\| \|\|Median Barrier Curbs~~\|\|B-1
	\|-		\|-
	\| \|\|Sidewalks\|\|B-2		\| \|\|Sidewalks\|\|B-2

Smithk: /* 751.4.1 Reinforced Concrete */ Per BR, added non-integral end bents to the list of concrete classes

2015-08-06T13:02:51Z

751.4.1 Reinforced Concrete: Per BR, added non-integral end bents to the list of concrete classes

← Older revision		Revision as of 08:02, 6 August 2015
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	\|-		\|-
	\| \|\|Integral End Bents (Below lower construction joint)\|\|B		\| \|\|Integral End Bents (Below lower construction joint)\|\|B
			\|-
			\| \|\|Non-Integral End Bents \|\|B
	\|-		\|-
	\| \|\|Semi-Deep Abutments (Below construction joint under slab)\|\|B		\| \|\|Semi-Deep Abutments (Below construction joint under slab)\|\|B

Smithk: /* 751.4.1 Reinforced Concrete */Per Bridge, corrected the usage of Class B and Class B-1 concrete for intermediate bents.

2013-12-10T15:22:17Z

751.4.1 Reinforced Concrete: Per Bridge, corrected the usage of Class B and Class B-1 concrete for intermediate bents.

← Older revision		Revision as of 10:22, 10 December 2013
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	{\| border="0" cellpadding="2" cellspacing="0" align="center"		{\| border="0" cellpadding="2" cellspacing="0" align="center"

	\|colspan="2"\|'''Box ~~Curlverts~~'''\|\|B-1		\|colspan="2"\|'''Box Culverts'''\|\|B-1
	\|-		\|-
	\|colspan="2"\|'''Retaining Walls'''\|\|B or B-1		\|colspan="2"\|'''Retaining Walls'''\|\|B or B-1
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	\|colspan="2"\|'''Superstructure (General)'''\|\|B-2		\|colspan="2"\|'''Superstructure (General)'''\|\|B-2
	\|-		\|-
	\| \|\|Curbs and Parapets\|\|B-1		\|width="20"\| \|\|Curbs and Parapets\|\|B-1
	\|-		\|-
	\| \|\|Safety Barrier Curbs\|\|B-1		\| \|\|Safety Barrier Curbs\|\|B-1
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	\| \|\|Prestressed Double -Tee Girders\|\|A-1		\| \|\|Prestressed Double -Tee Girders\|\|A-1
	\|-		\|-
	\| \|\|Integral End Bents\|\|B-2		\| \|\|Integral End Bents (Above lower construction joint)\|\|B-2
	\|-		\|-
	\| \|\|~~colspan="2"\|~~(Above ~~lower~~ construction joint)		\| \|\|Semi-Deep Abutments (Above construction joint under slab)\|\|B-2
	\|-		\|-
	\| \|~~\|Semi-Deep Abutments~~\|\|B-2		\|colspan="2"\|'''Substructure (General)'''\|\|B
	\|-		\|-
	\| \|\|~~colspan="2"\|~~(~~Above~~ construction joint ~~under slab~~)		\| \|\|Integral End Bents (Below lower construction joint)\|\|B
	\|-		\|-
	\|~~colspan="2"~~\|~~'''Substructure~~ (~~General~~)~~'''~~\|\|B ~~(*)~~		\| \|\|Semi-Deep Abutments (Below construction joint under slab)\|\|B
	\|-		\|-
	\| \|\|~~Integral End~~ Bents\|\|B		\| \|\|Intermediate Bents\|\|B (*)
	\|-		\|-
	\| \|\|~~colspan~~="2"\|(Below ~~lower~~ construction joint)		\| \|\|width="485"\|Intermediate Bent Columns, End Bents (Below construction <br/>joint at bottom of slab in Cont. Conc. Slab Bridges)\|\|B-1
	\|-		\|-
	~~\| \|\|Semi-Deep Abutments\|\|B~~		\| \|\|colspan="2"\|
	\|-
	~~\| \|\|colspan="2"\|(Below construction joint under slab)~~
	\|-
	~~\| \|\|Intermediate Bents\|\|B~~
	\|-
	~~\| \|\|Columns\|\|B (*)~~
	\|-
	~~\| \|\|Intermediate Bent Columns, End Bents\|\|B-1~~
	\|-
	\| \|\|colspan="2"\|~~(Below construction joint at bottom of slab in Cont. Conc. Slab Bridges)~~
	\|-		\|-
	\| \|\|Footings\|\|B		\| \|\|Footings\|\|B
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	\|}		\|}

			(*) In special cases when a stronger concrete is necessary for design, Class B-1 may be considered for intermediate bents (caps, columns, tie beams, web beams, collision walls and/or footings).
	(*) ~~For continuous concrete slab bridges or in~~ special cases when a stronger concrete is ~~deemed~~ necessary ~~by the designer~~, ~~use class~~ B-1 for columns and ~~end bents below construction joint at bottom of slab~~.

Smithk: article attached to new EPG 751

2010-04-15T14:18:58Z

article attached to new EPG 751

← Older revision		Revision as of 09:18, 15 April 2010
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	\|}		\|}

	[[Category:751 LRFD ~~Manual General~~\|751.04]]		[[Category:751 LRFD Bridge Design Guidelines\|751.04]]

EPG-Admin at 16:13, 28 September 2007

2007-09-28T16:13:12Z

New page

== 751.4.1 Reinforced Concrete ==

'''Classes of Reinforced Concrete'''

Below are classes of concrete for each type or portion of structure:

{| border="0" cellpadding="2" cellspacing="0" align="center"

|colspan="2"|'''Box Curlverts'''||B-1
|-
|colspan="2"|'''Retaining Walls'''||B or B-1
|-
|colspan="2"|'''Superstructure (General)'''||B-2
|-
| ||Curbs and Parapets||B-1
|-
| ||Safety Barrier Curbs||B-1
|-
| ||Median Barrier Curbs||B-1
|-
| ||Sidewalks||B-2
|-
| ||Raised Median||B-2
|-
| ||Slabs||B-2
|-
| ||Box Girders||B-2
|-
| ||Deck Girders||B-2
|-
| ||Prestressed Precast Panels||A-1
|-
| ||Prestressed I - Girders||A-1
|-
| ||Prestressed Double -Tee Girders||A-1
|-
| ||Integral End Bents||B-2
|-
| ||colspan="2"|(Above lower construction joint)
|-
| ||Semi-Deep Abutments||B-2
|-
| ||colspan="2"|(Above construction joint under slab)
|-
|colspan="2"|'''Substructure (General)'''||B (*)
|-
| ||Integral End Bents||B
|-
| ||colspan="2"|(Below lower construction joint)
|-
| ||Semi-Deep Abutments||B
|-
| ||colspan="2"|(Below construction joint under slab)
|-
| ||Intermediate Bents||B
|-
| ||Columns||B (*)
|-
| ||Intermediate Bent Columns, End Bents||B-1
|-
| ||colspan="2"|(Below construction joint at bottom of slab in Cont. Conc. Slab Bridges)
|-
| ||Footings||B
|-
| ||Drilled Shafts||B-2
|-
| ||Cast-In-Place Pile||B-1
|}

(*) For continuous concrete slab bridges or in special cases when a stronger concrete is deemed necessary by the designer, use class B-1 for columns and end bents below construction joint at bottom of slab.

{|border="1" style="text-align:center" cellpadding="5" align="center"
|-
|+'''Unit Stresses of Reinforced Concrete'''
|-
!Class of Concrete||Aggregate Maximumsize (Inches)||Cement Factor (barrels percubic yard)||<math>\,f'c</math> (psi)||<math>\,fc</math> (psi)||<math>\,n</math> (*)||<math>\,E_c</math> (ksi)
|-
|A-1||3/4||1.6 (Min.)||5,000||2,000||6||4074
|-
|B||1||1.4 (Min.)||3,000||1,200||10||3156
|-
|B-1||1||1.6 (Min.)||4,000||1,600||8||3644
|-
|B-2||1||1.875 (Min.)||4,000||1,600||8||3644
|}
<center>(*) Values of n for computations of strength only.

{| border="0" cellpadding="6" cellspacing="0" align="center"

!align="left"|'''Reinforcing Steel'''
|-
|Reinforcing Steel (Grade 60)||<math>\,F_y</math> = 60 ksi
|}

[[Category:751 LRFD Manual General|751.04]]