Full-Scale Flexure Specimens Preliminary Design Drawings.pdf

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Attached to
Precast Concrete Moment Frame Assemblies for Structural Testing at the NFRL Federal contract opportunity
Solicitation number
AMDTCRQ2601207
Issued by
Department of Commerce National Institute of Standards and Technology

About this file

Written by GovTribe AI ·

This document is a technical drawing specification for full-scale flexure specimens used in structural testing, created by the National Institute of Standards and Technology (NIST). The drawings detail two primary beam-column connection types: a threaded rod connection and a bar coupler connection, both designed for precast concrete structural systems.

The specimen dimensions specify a 360-inch overall length with a 62-inch height, utilizing reinforced concrete construction with built-up box sections measuring 18 inches by 9.75 inches by 12 inches. Key reinforcement components include No. 10 A706 Grade 60 longitudinal bars, No. 4 and No. 5 A706 Grade 60 shear reinforcement, and continuity bars of No. 10 A706 Grade 80 material. The threaded rod connection employs Ø1.34-inch A722 threaded rods with embedded couplers, while the bar coupler connection uses HRC 500XL/510XL mechanical couplers conforming to ACI 318-19 §25.5.7.1 standards. Additional specifications include Ø2.34-inch corrugated ducts for post-tensioning, 3.5-inch inner diameter pipe with 0.5-inch wall thickness for support, load cells with spherical washers, and armoring plates (L8×6×3/4 inches). The confined end regions feature 8-inch spacing at 4-inch intervals concentrated over 28 inches, with demand critical welds meeting AWS D1.8/D1.8M requirements. All dimensions are presented in inches, and the drawings were finalized on 02/25/2026 under NIST designation.

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ALL DIMENSIONS ARE SHOWN IN INCHES

Notes:

National Institute of Standards and Technology

Assembly:

Title:

File Name:

Drawn By:

Designed By:

Checked By:

Contacts: Drawing:

Specimen Dimensions

A SECTION

A Pipe 3.5 ID

0.5 wall

VER DESCRIPTION DATE

REVISIONS

1 2

Jonathan Weigand ( jonathan.weigand@nist.gov )

Full-scale Flexure Specimens Full-scale_Flexure_Specimens.dwg

02/25/2026

SR

SR

Malcolm Ammons ( malcolm.ammons@nist.gov )

1.0

National Institute of Standards and Technology

Assembly:

Title:

File Name:

Drawn By:

Designed By:

Checked By:

Contacts: Drawing:

Longitudinal bar (No. 10 A706 Gr. 60)

5 8

Ø13 4 A722 Thread bar

2 5

Longitudinal bar (No. 10 A706 Gr. 60)

5 8

2 5

Longitudinal bar (No. 10 A706 Gr. 60)

5 8

2 5

51 8

Continuity bar (No. 10 A706 Gr. 80)

1 8

Jonathan Weigand ( jonathan.weigand@nist.gov )

Full-scale Flexure Specimens

Full-scale_Flexure_Specimens.dwg

SR

SR

Malcolm Ammons ( malcolm.ammons@nist.gov )

ALL DIMENSIONS ARE SHOWN IN INCHES

Beam Sections

VER DESCRIPTION DATE

REVISIONS

02/25/20261.0

Beam Section Beam Section with Thread bar connection

Beam Section with Bar coupler connection

Assembly:

Title:

File Name:

Drawn By:

Designed By:

Checked By:

Contacts:

Jonathan Weigand ( jonathan.weigand@nist.gov )

Drawing:

Ø23 4 Corrugated duct

Embedded coupler

2 x 81

4 Pocket through beam

Built-up box section (18 x 93

4 x 12)

Full-scale Flexure Specimens Threaded Rod Connection

A1

A

Longitudinal bar (No. 10 A706 Gr. 60)

Shear reinforcement (No. 4 A706 Gr. 60)

Skin steel (No. 4 A706 Gr. 60)

(2) Hanger (No. 10 A706 Gr. 60)

B C

CONFINED END REGION

8 @ 4 = 28

14 @ 8 = 112

2 - in. Joint

Dry pack with grout

Stirrup spacing:

Pipe 3.5 ID

0.5 wall

Ø13 4 A722 Threaded rod

(4) U-bars (No. 5 A706 Gr. 60)

National Institute of Standards and Technology

Armoring (L8x6x3

4)

Built-up box section (18 x 93

4 x 12)

2 x 71

2 x 2 PL Washer Load cell with spherical washer

2 x 5

Sight hole

VER DESCRIPTION DATE

REVISIONS

Full-scale_Flexure_Specimens.dwg

02/25/2026

A2 A2 A2

A5

A4

A4

6 x 12 x 1 Neoprene bearing pad

2 @ 4 = 8

Ø11 4 hole for Ø1 Torsion rod

6 x 6 x 21

Plate

No.5 shear reinforcement

Ø11 4 hole for

Ø1 Torsion rod with two

No.5 U-bars @ 73

8 spacing

SR

SR

Malcolm Ammons ( malcolm.ammons@nist.gov )

1.0

1 2

2 x 81

4 Pocket through beam

Built-up box section (18 x 93

4 x 12)

Full-scale Flexure Specimens Threaded Rod Connection

A1-2

A

Longitudinal bar (No. 10 A706 Gr. 60)

Shear reinforcement (No. 4 A706 Gr. 60)

Skin steel (No. 4 A706 Gr. 60)

(2) Hanger (No. 10 A706 Gr. 60)

B C

CONFINED END REGION

8 @ 4 = 28

14 @ 8 = 112Stirrup spacing:

Pipe 3.5 ID

0.5 wall

(4) U-bars (No. 5 A706 Gr. 60)

National Institute of Standards and Technology

Armoring (L8x6x3

4)

Built-up box section (18 x 93

4 x 12)

2 x 5

Sight hole

VER DESCRIPTION DATE

REVISIONS

Full-scale_Flexure_Specimens.dwg

02/25/2026

A2 A2 A2

A5

A4

ALL DIMENSIONS ARE SHOWN IN INCHES

Assembly:

Title:

File Name:

Drawn By:

Designed By:

Checked By:

Contacts:

Jonathan Weigand ( jonathan.weigand@nist.gov )

Drawing:

2 @ 4 = 8

No.5 shear reinforcement

Ø11 4 hole for Ø1 Torsion rod with two No.5 U-bars @ 73

8 spacing

SR

SR

Malcolm Ammons ( malcolm.ammons@nist.gov )

1.0

Ø23 4 Corrugated duct

Ø11 4 hole for

Ø1 Torsion rod

2 x 5

Sight hole

National Institute of Standards and Technology

Assembly:

Title:

File Name:

Drawn By:

Designed By:

Checked By:

Contacts: Drawing:

Built-up box section (18 x 93

4 x 12)

Longitudinal bars (No. 10) welded to built-up section

Longitudinal bar (No. 10 A706 Gr. 60)

Skin steel (No. 4 A706 Gr. 60)

1 TYP

3 8

3 8

A SECTION B SECTION C SECTION

81 8

Ø23 4 Corrugated duct

Ø13 4 A722 Threaded rod

2 x 81

4 x 12 Pocket

Shear reinforcement (No. 4 A706 Gr. 60)

VER DESCRIPTION DATE

REVISIONS

A1 A1 A1

A4

Shear reinforcement (No. 4 A706 Gr. 60)

Cross tie (No. 4 A706 Gr. 60)

31 4

2 7

2 5

Jonathan Weigand ( jonathan.weigand@nist.gov )

Full-scale Flexure Specimens Threaded Rod Connection

Full-scale_Flexure_Specimens.dwg

02/25/2026

SR

SR

Malcolm Ammons ( malcolm.ammons@nist.gov )

A2

Embedded coupler A SECTION

B SECTION

C SECTION

1 2

1 2

1 2

1 2

National Institute of Standards and Technology

3 4

VER DESCRIPTION DATE

REVISIONS

A4

ALL DIMENSIONS ARE SHOWN IN INCHES

Notes:

Assembly:

Title:

File Name:

Drawn By:

Designed By:

Checked By:

Contacts: Drawing:

A3

A

B

C A3

A3

A3

A3

A3

A3

Shear reinforcement (No. 5 A706 Gr. 60)

Column longitudinal (No. 10 A706 Gr. 60)

Embedded coupler

A4

4 hole for Torsion

Rod (1 dia.)

Jonathan Weigand ( jonathan.weigand@nist.gov )

Full-scale Flexure Specimens Threaded Rod Connection

Full-scale_Flexure_Specimens.dwg

02/25/2026

SR

SR

Malcolm Ammons ( malcolm.ammons@nist.gov )

1.0

6=

4@

6=

3@ 31 2=

1 2

2@ 33 4=

71 2

2 Typ.

Column longitudinal (No. 10 A706 Gr. 60)

Shear reinforcement (No. 5 A706 Gr. 60)

No. 5 u-bar around torsion rod in column

4 hole for

Torsion Rod (1 dia.)

No. 5 u-bar around torsion rod @ 75 spacing in column

National Institute of Standards and Technology

Assembly:

Title:

File Name:

Drawn By:

Designed By:

Checked By:

Contacts: Drawing:

Longitudinal bar (No. 10 A706 Gr. 60)

(2) PL 34 x 93 4 x 12 (A36)

A4

1 BUILT-UP BOX DETAIL

Demand Critical Grind flush

93 4

(2) PL 34 x 161 2 x 12 (A36)

Demand Critical Grind flush

Demand Critical

Welds designated as Demand Critical will meet the requirements of AWS D1.8/D1.8M

VER DESCRIPTION DATE

REVISIONS

A1

8 63

Ø21

Jonathan Weigand ( jonathan.weigand@nist.gov )

Full-scale Flexure Specimens Threaded Rod Connection

Full-scale_Flexure_Specimens.dwg

02/25/2026

SR

SR

National Institute of Standards and Technology

Assembly:

Title:

File Name:

Drawn By:

Designed By:

Checked By:

Contacts: Drawing:

A5

1 ARMORING DETAIL

L8x6x3 4 (A36)

No. 6 Straight bar (A706 Gr 60)

VER DESCRIPTION DATE

REVISIONS

A1

2 COUPLER DETAIL

DYWIDAG Ø13

4 150KSI

THREADBAR COUPLER

(TIGHTEN COUPLER

AGAINST PL WASHER)

4 47

8DYWIDAG Ø13

4 150KSI

THREADBAR

PL WASHER 21

2 x 6 x 6

WITH Ø 21

4 HOLE (A36)B1

31 88

Jonathan Weigand ( jonathan.weigand@nist.gov )

Full-scale Flexure Specimens Threaded Rod Connection

Full-scale_Flexure_Specimens.dwg

02/25/2026

SR

SR

Assembly:

Title:

File Name:

Drawn By:

Designed By:

Checked By:

Contacts: Drawing:

Continuity bar (No. 10 A706 Gr. 80)

Link bar with upset ends

(No. 10 A706 Gr. 80)

Bar Coupler Connection

A

Longitudinal bar (No. 10 A706 Gr. 60)

Shear reinforcement (No. 4 A706 Gr. 60)

Skin steel (No. 4 A706 Gr. 60)

(2) Hanger (No. 10 A706 Gr. 60)

B

Stirrup spacing:

Pipe 3.5 ID

0.5 wall

(4) U-bars (No. 5 A706 Gr. 60)

National Institute of Standards and Technology

VER DESCRIPTION DATE

REVISIONS

18 @ 8 = 144

Void in beam to recess coupler during erection

Debonding sleeve (24 length) B4

B2 B2

6 x 12 x 1 Neoprene bearing pad

2 - in. Joint fully grouted as part of pocket grouting operation

Pocket in column (fill with grout)

CONFINED END REGION

8 @ 4 = 32

Rebar heads (Conforming to

ACI 318-19 § 20.2.1.6)

02/25/2026

Jonathan Weigand ( jonathan.weigand@nist.gov )

Full-scale Flexure Specimens Full-scale_Flexure_Specimens.dwg

SR

SR

Malcolm Ammons ( malcolm.ammons@nist.gov )

1.0

B1

Ø11 4 hole for Ø1 Torsion rod

1 2

Ø11 4 hole for

Ø1 Torsion rod with two

No.5 U-bars @ 73

8 spacing

3 x 3 x 5 hole

Bar Coupler Connection

A

Longitudinal bar (No. 10 A706 Gr. 60)

Shear reinforcement (No. 4 A706 Gr. 60)

Skin steel (No. 4 A706 Gr. 60)

(2) Hanger (No. 10 A706 Gr. 60)

B

Stirrup spacing:

Pipe 3.5 ID

0.5 wall

(4) U-bars (No. 5 A706 Gr. 60)

National Institute of Standards and Technology

VER DESCRIPTION DATE

REVISIONS

18 @ 8 = 144

Void in beam to recess coupler during erection

Debonding sleeve (24 length)

ALL DIMENSIONS ARE SHOWN IN INCHES

Assembly:

Title:

File Name:

Drawn By:

Designed By:

Checked By:

Contacts: Drawing:

Continuity bar (No. 10 A706 Gr. 80)

B2 B2

CONFINED END REGION

8 @ 4 = 32

Rebar heads (Conforming to

ACI 318-19 § 20.2.1.6)

02/25/2026

Jonathan Weigand ( jonathan.weigand@nist.gov )

Full-scale Flexure Specimens Full-scale_Flexure_Specimens.dwg

SR

SR

Malcolm Ammons ( malcolm.ammons@nist.gov )

1.0

B1-2

Ø11 4 hole for Ø1 Torsion rod

1 2

Ø11 4 hole for

Ø1 Torsion rod with two

No.5 U-bars @ 73

8 spacing

Armoring (L8x6x3

4)

3 x 3 x 5 hole

A5

National Institute of Standards and Technology

Assembly:

Title:

File Name:

Drawn By:

Designed By:

Checked By:

Contacts: Drawing:

A SECTION B SECTION

Continuity bar (No.10 A706 Gr. 80 )

VER DESCRIPTION DATE

REVISIONS

B1 B1

Longitudinal bar (No. 10 A706 Gr. 60)

Skin steel (No. 4 A706 Gr. 60)

51 8

Shear reinforcement (No. 4 A706 Gr. 60)

Cross tie (No. 4 A706 Gr. 60)

2 5 12

1 TYP

3 8

3 8

Shear reinforcement (No. 4 A706 Gr. 60)

2 7

Bar Coupler Connection

02/25/2026

Jonathan Weigand ( jonathan.weigand@nist.gov )

Full-scale Flexure Specimens Full-scale_Flexure_Specimens.dwg

SR

SR

Malcolm Ammons ( malcolm.ammons@nist.gov )

B2

Embedded coupler

A SECTION

B SECTION

C SECTION

1 2

1 2

1 2

1 2

National Institute of Standards and Technology

3 4

VER DESCRIPTION DATE

REVISIONS

B4

ALL DIMENSIONS ARE SHOWN IN INCHES

Notes:

Assembly:

Title:

File Name:

Drawn By:

Designed By:

Checked By:

Contacts: Drawing:

A

B

C B3

B3

B3

B3

B3

B3

Shear reinforcement (No. 5 A706 Gr. 60)

Column longitudinal (No. 10 A706 Gr. 60)

Embedded coupler

B4

6=

5@

6=

Bar Coupler Connection

02/25/2026

Jonathan Weigand ( jonathan.weigand@nist.gov )

Full-scale Flexure Specimens Full-scale_Flexure_Specimens.dwg

SR

SR

Malcolm Ammons ( malcolm.ammons@nist.gov )

1.0

B3

3@ 31 2=

1 2

2@ 33 4=

71 2

Column longitudinal (No. 10 A706 Gr. 60)

Shear reinforcement (No. 5 A706 Gr. 60)

2 Typ.

4 hole for Torsion Rod (1 dia.)

No. 5 u-bar around torsion rod in column

4 hole for

Torsion Rod (1 dia.)

No. 5 u-bar around torsion rod @ 75 spacing in column

National Institute of Standards and Technology

Assembly:

Title:

File Name:

Drawn By:

Designed By:

Checked By:

Contacts: Drawing:

Tighten to complete connection

Install shims as needed to adjust length of 12 in.

1 SPLICE DETAIL

Slide coupler halves together

VER DESCRIPTION DATE

REVISIONS

Female coupler recessed in beam

Male coupler loose on link bar

Bar extension

Link bar (No. 10 A706 Gr. 80)

Upset end

Continuity bars (No. 10 A706 Gr. 80)

ColumnBeam Beam

Pocket in column, grout after completing connection

B1

Bar coupler HRC 500XL / 510 XL or equivalent, conforming to

ACI 318-19 §25.5.7.1

Bar Coupler Connection

02/25/2026

Jonathan Weigand ( jonathan.weigand@nist.gov )

Full-scale Flexure Specimens Full-scale_Flexure_Specimens.dwg

SR

SR

Malcolm Ammons ( malcolm.ammons@nist.gov )

B4

Prototype_Flexure_Specimens_v1-27-Specimen dimensions
Sheets and Views
Specimen dimensions
Prototype_Flexure_Specimens_v1-27-BeamSections
Sheets and Views
BeamSections
Prototype_Flexure_Specimens_v1-27-ThreadedRod-overview
Sheets and Views
ThreadedRod-overview
Prototype_Flexure_Specimens_v1-27-ThreadedRod-overview-2
Sheets and Views
ThreadedRod-overview-2
Prototype_Flexure_Specimens_v1-27-ThreadedRod-section
Sheets and Views
ThreadedRod-section
Prototype_Flexure_Specimens_v1-27-ThreadedRod-column
Sheets and Views
ThreadedRod-column
Prototype_Flexure_Specimens_v1-27-ThreadedRod-detail 1
Sheets and Views
ThreadedRod-detail 1
Prototype_Flexure_Specimens_v1-27-ThreadedRod-detail 2
Sheets and Views
ThreadedRod-detail 2
Prototype_Flexure_Specimens_v1-27-Bar coupler-overview
Sheets and Views
Bar coupler-overview
Prototype_Flexure_Specimens_v1-27-Bar coupler-overview-2
Sheets and Views
Bar coupler-overview-2
Prototype_Flexure_Specimens_v1-27-Bar coupler -section
Sheets and Views
Bar coupler -section
Prototype_Flexure_Specimens_v1-27-BarCoupler-column
Sheets and Views
BarCoupler-column
Prototype_Flexure_Specimens_v1-27-Bar coupler -detail
Sheets and Views
Bar coupler -detail

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