DEWALT Deck Insert Plus DDI Threaded for Metal Deck Owner’s Manual

DEWALT Deck Insert Plus DDI Threaded for Metal Deck

Product Information

Specifications

• Anchor Component: Metal Plate
• Hex Head Bolt Component Material: ASTM A1011 Carbon steel or equivalent (plain)
• Hex Head Bolt Grade: ASTM A307 Grade A (zinc plated)

Product Description
The DDI+ (Deck Insert) is a threaded insert designed for metal deck applications. It offers fast and simple installation, with pre-mounted self- drilling screws for convenience. The insert has a fine-tuned thread length to ensure a guaranteed minimum embedment.
The lengthened T brace provides more flexible installation positions, and it ensures consistent uniform drop lengths below floor decks in every installation position.

Installation Instructions

1. Step 1: Determine the appropriate bolt diameter based on your needs (3/8-inch to 7/8-inch).
2. Step 2: Use the specified drill bit diameter for the deck according to the bolt diameter.
3. Step 3: Ensure the minimum nominal embedment depth based on the insert plate specifications.
4. Step 4: Install the DDI+ insert securely in accordance with the provided instructions.

Performance Data
The DDI+ insert meets strength design requirements and offers reliable performance for metal deck applications.

FAQ

• Q: What are the typical applications for the DDI+ insert?
  A: The DDI+ insert is commonly used in lightweight concrete-filled metal deck assemblies.

• Q: Is the DDI+ insert code listed?
  A: Yes, the DDI+ insert is ICC-ES ESR-3958 listed.

GENERAL INFORMATION

PRODUCT DESCRIPTION
The DDI+ (Deck Insert) is a concrete insert designed for installation in concrete-filled metal deck assemblies (i.e. “pan-deck”, “Q-deck”). After installation, the threaded male hanger of the insert protrudes below the surface of the deck. The DDI+ comes in sizes ranging from 3/8″ to 7/8″ in diameter. The threaded bolt offers adjustability for precise height requirements and guarantees the minimum embedment depth. The longer “T” brace insert plate enables a variety of installation locations in across the deck.

GENERAL APPLICATIONS AND USES

• Seismic Loading and Cracked Concrete
• Hanging Pipe and Sprinkler Systems
• HVAC Ductwork and Strut Channels
• Suspending Trapeze and Cable Trays
• Mechanical Unit Overhead Utilities
• Conduit and Lighting Systems

FEATURE AND BENEFITS

• Fast and simple to install, low installed cost
• Pre-mounted self-drilling screws for convenient installation
• Fine-tuned thread length for guaranteed minimum embedment
• Lengthened “T” brace for more flexible installation positions
• Provides consistent uniform drop lengths below floor decks in every installation position

APPROVALS AND LISTINGS

• International Code Council, Evaluation Service (ICC-ES), ESR-3958 for concrete-filled metal decks
• Tested and qualified by ICC-ES AC446 for use in concrete-filled metal decks under the design provisions of ACI 318 (-19 or -14) Chapter 17 or ACI 318-11 (Appendix D)
• Code compliant with the 2021 IBC/IRC, 2018 IBC/IRC, 2015 IBC/IRC and 2012 IBC/IRC
• Underwriters Laboratories (UL Listed) – File No. EX1289, see listing for sizes
• FM Approvals (Factory Mutual) – see listing for sizes

GUIDE SPECIFICATIONS
CSI Divisions: 03 15 19 – Cast-In Concrete Anchors and 03 16 00 – Concrete Anchors. Concrete inserts shall be DDI+ as supplied by DEWALT, Towson, MD. Anchor inserts shall be installed in accordance with published instructions and the Authority Having Jurisdiction.

MATERIAL SPECIFICATIONS

THREAD VERSION

• UNC Thread

ANCHOR MATERIALS

• Plain and zinc-plated carbon steel

ANCHOR SIZE RANGE

• 3/8″ through 7/8″ diameters

SUITABLE BASE MATERIALS

• Normal-weight concrete or lightweight concrete filled metal deck assemblies

INSTALLATION SPECIFICATIONS

DDI+ Insert Installation Information and Supplemental Information1,2

Design Information| Notation| Units| 3/8- inch| 1/2- inch| 5/8- inch| 3/4- inch| 7/8- inch
---|---|---|---|---|---|---|---
Nominal bolt diameter| da| in. (mm)| 0.375

(9.5)

| 0.500

(12.7)

| 0.625

(15.9)

| 0.750

(19.1)

| 0.875

(22.2)

Bolt thread size (UNC)| –| in.| 3/8-16| 1/2-13| 5/8-11| 3/4-10| 7/8-9
Length of insert bolt| ℓbolt| in (mm)| 8

(203)

| 8

(203)

| 8

(203)

| 8

(203)

| 8

(203)

Typical drill bit diameter for deck| dbit| in.| 7/16 or 1/2| 9/16 or 5/8| 11/16 or 3/4| 13/16 or 7/8| 15/16 or 1
Nominal overall length of insert plate| ℓplate| in.2 (mm2)| 12

(305)

| 12

(305)

| 12

(305)

| 12

(305)

| 12

(305)

Nominal width of insert plate| Wplate| in.2 (mm2)| 1-1/4 (32)| 1-1/4 (32)| 1-1/4 (32)| 2

(51)

| 2

(51)

Approximate thickness of insert plate| tplate| in. (mm)| 3/16 (4.8)| 3/16 (4.8)| 3/16 (4.8)| 3/8 (9.5)| 3/8 (9.5)

Minimum nominal embedment depth

| over upper flute| hnom (upperflute)|

in. (mm)

|

1-3/4 (45)

|

2

(51)

|

2-3/8 (60)

|

2-5/8 (67)

|

2-5/8 (67)

over flute incline| hnom (upperincline)
over lower flute| hnom (lowerflute)

Minimum effective embedment depth

| over upper flute| hef (upperflute)|

in. (mm)

|

1.50

(38)

|

1.75

(45)

|

2.00

(51)

|

2.20

(56)

|

2.05

(52)

over flute incline| hef (upperincline)
over lower flute| hef (lowerflute)
Minimum concrete member thickness (topping thickness)| over upper flute| hmin (upperflute)|

in. (mm)

|

2

(51)

|

2-1/2 (64)

|

3

(76)

|

3-1/4 (83)

|

3-1/4 (83)

over flute incline| hmin (upperincline)
over lower flute| hmin (lowerflute)

Minimum flute edge distance (insert bolt)

| over upper flute| cmin,deck (upperflute)| in. (mm)| N/A| N/A| N/A| N/A| N/A
over flute incline| cmin,deck (upperincline)
over lower flute| cmin,deck (lowerflute)| in. (mm)| see figure C| see figure C| see figure C| see figure C| see figure C
Minimum spacing distance (bolt spacing, center-to-center)| over upper flute| smin (upperflute)| in. (mm)| 1-1/2 (38)| 2

(51)

| 2-1/2 (64)| 3

(76)

| 3-1/2 (89)
over flute incline| smin (upperincline)| in. (mm)| 4-1/2 (114)| 5-1/4 (133)| 6

(152)

| 6-5/8 (168)| 6-5/8 (168)
over lower flute| smin (lowerflute)

Minimum deck end distance

| over upper flute| cmin (upperflute)|

in. (mm)

| specified cover requirements for reinforcement in accordance with AC318-19 17.9.2(a), ACI 318-14 17.7.2 or ACI 318-11 7.7, as applicable.

4da can be considered as a guideline if specified cover requirements are not provided and/or available.

over flute incline| cmin (upperincline)
over lower flute| cmin (lowerflute)
Approx. Thread Projection (through 3-inch- deep deck)| over Upper flute|

–

|

in.

| 6-1/4| 6| 5-5/8| 5-3/8| 5-3/8
over Lower flute| 3-1/4| 3| 2-5/8| 2-3/8| 2-3/8

Effective tensile stress area (insert bolt)| Ase| in.2 (mm2)| 0.078

(50)

| 0.142

(92)

| 0.226

(146)

| 0.335

(212)

| 0.462

(293)

Insert head net bearing area| Abrg| in.2 (mm2)| 0.17

(110)

| 0.28

(181)

| 0.45

(290)

| 0.65

(419)

| 0.89

(574)

Minimum specified ultimate strength| futa| psi (N/mm2)| 60,000

(400)

Minimum specified yield strength| fya| psi (N/mm2)| 36,000

(248)

for sI: 1 inch = 25.4 mm, 1 ft-lb = 1.356 N-m

1.   for installation detail for inserts in concrete-filled steel deck assemblies, see figures A, B and C (i.e. over upper flute, over flute incline, over lower flute).

2.   The insert plate is premouted with a #8-18 self-drilling screw with a #2 drill point (16 gauge max thickness).

DDI+ Insert Detail

INSTALLATION INSTRUCTIONS

• Cut (e.g. drill/punch) a hole in the steel deck to the hole size required by the threaded bolt of the insert.
• Place the threaded bolt of the insert through the hole in the steel deck.
• The metal plate of the insert must be on the top of the deck flutes. The metal plate can (optionally) be secured to the deck using the pre-assembled self-drilling screws.

DDI+ Deck Zone Placement Guidance

Notes for Figures A, B and C:

1. Installations require a minimum concrete member topping thickness from the top of the upper flute as given in the Design Information Table.

2. Inserts may be placed on the upper flute of the steel deck assembly; they may be installed anywhere across upper flute as follows:
   (Figure A) – Placed over the upper flute with threaded bolt installed through the upper flute or;(Figure B) – Placed over the upper flute spanning the lower flute with threaded bolt installed through the inclined section or;
   (Figure C) – Placed over the upper flute spanning the lower flute with threaded bolt installed through the lower flute.

3. Inserts over the upper flute with threaded bolt installed through the upper flute may be placed in any location and orientation that meets the minimum deck end distance requirements (see Design Information Table). The minimum deck end distance is measured from deck end to the centerline of the insert bolt.

4. Inserts over the upper flute spanning the lower flute with threaded bolt installed through the inclined section may be placed in any location and orientation that meets the minimum deck end distance requirements (see Design Information Table). The minimum deck end distance is measured from deck end to the centerline of the insert bolt.

5. Inserts over the upper flute spanning the lower flute with threaded bolt installed through
   the lower flute may be placed in any location that meets the minimum deck end distance and minimum lower flute edge distance requirements. The minimum deck end distance is measured from deck end to the centerline of the insert bolt. For lower flute widths of 3-7/8-inch, a maximum 1-inch centerline bolt offset in either direction from the center of the flute. The offset distance may be increased for flute widths greater than those shown provided the minimum lower flute edge distance of 15/16-inch is also satisfied.

PERFORMANCE DATA (ASD)

Ultimate and Allowable Load Capacities for DDI+ (Deck Insert) Installed in the Soffit of Sand-lightweight or Normal Weight Concrete over Metal Deck Floor and Roof Assemblies1,2,3,4,5,6

Nominal Anchor Diameter in.

|

Nominal Embed. Depth h nom

in.

|

Min. Concrete Topping Thickness in.

|

Min. Insert Spacing in.

|

Min. End Distance in.

| Normal-weight or Sand-lightweight concrete, f’c ≥ 3,000 psi
---|---|---|---|---|---
3-7/8″ or 4-1/2″ Wide Deck
Installed Over Upper Flute| Installed Over Flute Incline| Installed Over Lower Flute
Ultimate Load| Allowable Load| Ultimate Load| Allowable Load| Ultimate Load| Allowable Load
Tension lbs.| Shear lbs.| Tension lbs.| Shear lbs.| Tension lbs.| Shear lbs.| Tension lbs.| Shear lbs.| Tension lbs.| Shear lbs.| Tension lbs.| Shear lbs.
3/8| 1-3/4| 2| 4-1/2| 6| 3,420| 1,985| 1,140| 660| 5,230| 1,985| 1,745| 660| 5,230| 2,610| 1,745| 870
1/2| 2| 2-1/2| 5-1/4| 7| 4,310| 4,205| 1,435| 1,400| 6,235| 4,205| 2,080| 1,400| 6,235| 5,155| 2,080| 1,720
5/8| 2-3/8| 3| 6| 8| 5,265| 6,450| 1,755| 2,150| 8,630| 6,450| 2,875| 2,150| 8,630| 6,820| 2,875| 2,275
3/4| 2-5/8| 3-1/4| 6-3/8| 8-3/4| 5,770| 6,450| 1,925| 2,150| 8,630| 6,450| 2,875| 2,150| 8,630| 6,820| 2,875| 2,275
7/8| 2-5/8| 3-1/4| 6-3/8| 8-3/4| 5,770| 6,450| 1,925| 2,150| 8,630| 6,450| 2,875| 2,150| 8,630| 6,820| 2,875| 2,275
1.   Tabulated ultimate load values are for anchor inserts installed in uncracked concrete.

2.   Allowable load capacities listed are calculated using an applied safety factor of 3.0

3.   Nominal embedment depth is measured from the bottom of the insert plate to the top of the insert bolt head.

4.   Insert spacing and end distances are measured from the centerline of the insert bolt head.

5.   shear loads may be applied in any direction.

6.   for inserts installed over the upper flute and where shear loads act parallel to the flute, the tabulated allowable load valuesmay be increased by 20 percent (multiplied by 1.2).

UL Listings and FM Approvals for Supporting Fire Protection Services & Automatic Sprinkler Systems

Listing / Approval

| DDI+ Threaded Concrete Inserts
---|---
3/8- inch| 1/2- inch| 5/8- inch| 3/4- inch| 7/8- inch
UL Max. Pipe size| 4″| 8″| 12″| 12″| 12″
fM Max. Pipe size| 4″| 8″| 12″| 12″| –
Underwriters Laboratories (UL Listed) – file No. EX1289 and VfXT7.EX1289

fM Approvals (factory Mutual)

STRENGTH DESIGN INFORMATION

DDI+ Insert Design Information¹²³⁴⁵⁶

Design Information| Symbol| Units| 3/8- inch| 1/2- inch| 5/8- inch
---|---|---|---|---|---
Insert o.D. (nominal bolt diameter)| da| in. (mm)| 0.375

(9.5)

| 0.500

(12.7)

| 0.625

(15.9)

Insert head net bearing area| Abrg| in2 (mm2)| 0.17

(110)

| 0.28

(181)

| 0.45

(290)

Effective tensile stress area| Ase| in.2 (mm2)| 0.078

(50)

| 0.142

(92)

| 0.226

(146)

Effective embedment depth

| over upper flute| hef (upperflute)|

in. (mm)

|

1.50

(38)

|

1.75

(45)

|

2.00

(51)

over flute incline| hef (fluteincline)
over lower flute| hef (lowerflute)
Minimum concrete member thickness (topping thickness over upper flute)| hmin| in. (mm)| 2.00

(51)

| 2.50

(64)

| 3.25

(83)

Minimum spacing and edge distance| smin, cmin| in. (mm)| see Installation Information Table and figures A, B and C
Effectiveness factor for cracked concrete| kc| – (sI)| 24 (10)
Modification factor for tension strength in uncracked concrete| Y C,n| –| 1.25
According to figures A, B or C| Nominal tension strength of single insert as governed by steel strength| Nsa,insert| lb (kN)|

4,650

(20.7)

|

8,520

(37.9)

|

13,560

(60.3)

Nominal tension strength of single insert as governed by steel strength, seismic| Nsa,insert,eq| lb (kN)
According to figure A (over upper flute)| Nominal steel shear strength of single insert in the soffit of concrete on steel deck| Vsa,insert,deck (upperflute)| lb (kN)| 2,280

(10.1)

| 4,260

(18.9)

|

7,245

(32.2)

Nominal steel shear strength of single insert in the soffit of concrete on steel deck, seismic| Vsa,insert,deck,eq (upperflute)| lb (kN)| 1,825

(8.1)

| 3,410

(15.2)

According to figure B (over flute incline)| Nominal steel shear strength of single insert in the soffit of concrete on steel deck| Vsa,insert,deck (fluteincline)| lb (kN)| 1,310

(5.8)

| 3,410

(15.2)

|

5,240

(23.3)

Nominal steel shear strength of single insert in the soffit of concrete on steel deck, seismic| Vsa, insert, deck, eq (fluteincline)| lb (kN)| 1,045

(4.6)

| 2,860

(12.7)

According to figure C (over lower flute)| Nominal steel shear strength of single insert in the soffit of concrete on steel deck| Vsa, insert, deck (lowerflute)| lb (kN)| 2,280

(10.1)

| 4,260

(18.9)

|

5,735

(25.5)

Nominal steel shear strength of single insert in the soffit of concrete on steel deck, seismic| Vsa, insert, deck, eq (lowerflute)| lb (kN)| 2,015

(9.0)

| 3,410

(15.2)

for sI: 1 inch = 25.4 mm, 1 pound = 4.45 N, 1 psi = 0.006895 MPa. for pound- inch unit: 1 mm = 0.03937 inches.

1.   Concrete must have a compressive strength f ‘c of 3,000 psi (20.7 MPa) minimum.

2.   Design of headed cast-in specialty inserts shall be in accordance with the provisions of ACI 318 (-19 or -14) Chapter 17 or ACI 318-11 Appendix D, as applicable, for cast-in headed anchors. Concrete breakout strength must also be in accordance with the Idealization of Concrete filled steel Decks figure.

3.   strength reduction factors for the inserts shall be taken from ACI 318-19 section 17.5.3, ACI 318-14 17.3.3 or ACI 318-11 D.4.3, as applicable, for cast-in headed anchors. strength reduction factors for load combinations in accordance with ACI 318 (-19 or -14) 5.3 or ACI 318-11 9.2, as applicable, governed by steel strength of the insert shall be taken as 0.75 for

tension and 0.65 for shear; values correspond to ductile steel elements. The value of __  applies when the load combinations of section 1605.2 of the IBC, ACI 318 (-19 or -14) 5.3 or ACI

318-11 9.2, as applicable, are used in accordance with ACI 318-19 section 17.5.3, ACI 318-14 17.3.3 or ACI 318-11 D.4.3. If the load combinations of ACI 318-11 Appendix C are used, the appropriate value of  must be determined in accordance with ACI 318-11 D.4.4.

4.   Insert o.D. is the nominal bolt diameter of the insert.

5.   Minimum spacing distance between anchors and minimum edge distances for cast-in headed DDI+ inserts shall be in accordance with the Installation Information Table, Design Information Table, figures A, B and C and noted provisions.

6.   shear loads for concrete inserts in concrete-filled steel deck assemblies may be applied in any direction (i.e. over upper flute, over flute incline, over lower flute).

DESIGN STRENGTH TABLES (SD)

Tension and Shear Design Strengths for DDI+ Inserts Installed in Uncracked Lightweight Concrete Filled Steel Deck Floor and Roof Assemblies1,2,3,4,5,6

Tension and Shear Design Strengths for DDI+ Inserts Installed in Cracked Lightweight Concrete Filled Steel Deck Floor and Roof Assemblies1,2,3,4,5,6,7

1. Tabular values are provided for illustration and are applicable for single anchors installed in sand-lightweight concrete with minimum member thickness (topping thickness), ha = hmin, and with the following conditions:

   • For Upper Flute and Flute Incline: ca1 is greater than or equal to the critical edge distance, cac
   • For Lower Flute: ca1 is equal to the minimum lower flute edge distance

2. Calculations were performed following methodology in ACI 318 (-19 or -14) Chapter 17. The load level corresponding to the controlling failure mode listed (e.g.
   For Tension: steel strength, concrete breakout strength, or pullout strength; For Shear: steel strength). Furthermore, the capacities for concrete breakout strength
   in tension are calculated using the effective embedment values, hef, for the selected anchors as noted in the design information table. Please also reference the installation specifications for additional information.

3. Strength reduction factors (ø) for the inserts are based on ACI 318-19 17.5.3, ACI 318-14 17.3.3 for cast-in headed anchors. Condition B is assumed. Strength reduction factors for load combinations in accordance with ACI 318 (-19 and -14) Section 5.3 governed by steel strength of the insert are taken as 0.75 for tension and 0.65 for shear; values correspond to ductile steel elements.

4. Tabular values are permitted for static loads only, seismic loading is not considered with these tables.

5. For designs that include combined tension and shear, the interaction of tension and shear loads must be calculated in accordance with ACI 318 (-19 or -14) Chapter 17.

6. Interpolation is not permitted to be used with the tabular values. For intermediate base material compressive strengths, please see ACI 318 (-19 or -14) Chapter 17 and information contained in this product supplement. For other design conditions including seismic considerations please see ACI 318 (-19 or -14) Chapter 17.

7. For seismic design by ACI 318, the tabulated tension design strengths in cracked concrete for structures assigned to Seismic Design Categories C, D, E or F, concrete breakout and pullout must be multiplied by a factor of 0.75.

Tension and Shear Design Strengths for DDI+ Inserts Installed in Uncracked Normal-Weight Concrete Filled Steel Deck and Roof Assemblies1,2,3,4,5,6

Tension and Shear Design Strengths for DDI+ Inserts Installed in Cracked Normal-Weight Concrete Filled Steel Deck and Roof Assemblies1,2,3,4,5,6,7

1. Tabular values are provided for illustration and are applicable for single anchors installed in normal-weight concrete with minimum member thickness (topping thickness), ha = hmin, and with the following conditions:

2. For Upper Flute and Flute Incline: ca1 is greater than or equal to the critical edge distance, cac

3. For Lower Flute: ca1 is equal to the minimum lower flute edge distance

4. Calculations were performed following methodology in ACI 318 (-19 or -14) Chapter 17. The load level corresponding to the controlling failure mode listed (e.g.
   For Tension: steel strength, concrete breakout strength, or pullout strength; For Shear: steel strength). Furthermore, the capacities for concrete breakout strength
   in tension are calculated using the effective embedment values, hef, for the selected anchors as noted in the design information table. Please also reference the installation specifications for additional information.

5. Strength reduction factors (ø) for the inserts are based on ACI 318-19 17.5.3, ACI 318-14 17.3.3 for cast-in headed anchors. Condition B is assumed. Strength reduction factors for load combinations in accordance with ACI 318 (-19 and -14) Section 5.3 governed by steel strength of the insert are taken as 0.75 for tension and 0.65 for shear; values correspond to ductile steel elements.

6. Tabular values are permitted for static loads only, seismic loading is not considered with these tables.

7. For designs that include combined tension and shear, the interaction of tension and shear loads must be calculated in accordance with ACI 318 (-19 or -14) Chapter 17.

8. Interpolation is not permitted to be used with the tabular values. For intermediate base material compressive strengths, please see ACI 318 (-19 or -14) Chapter 17 and information contained in this product supplement. For other design conditions including seismic considerations please see ACI 318 (-19 or -14) Chapter 17.

9. For seismic design in accordance with ACI 318, the tabulated tension design strengths in cracked concrete for structures assigned to Seismic Design Categories C, D, E or F, concrete breakout and pullout must be multiplied by a factor of 0.75.

ORDERING INFORMATION

DDI+ (Deck Insert)

Cat. No.| Anchor Size| Rod/Anchor Dia.| Pack Qty.
---|---|---|---
PfM2511100| 3/8″ Metal Deck Insert| 3/8″| 20
PfM2511110| 1/2″ Metal Deck Insert| 1/2″| 20
PfM2511120| 5/8″ Metal Deck Insert| 5/8″| 20
PfM2511130| 3/4″ Metal Deck Insert| 3/4″| 12
PfM2511140| 7/8″ Metal Deck Insert| 7/8″| 12

DDI+ Installation Tools

Push-In Thread Couplers

Cat. No.| Description| Internal Thread Diameter| Pack Qty.
---|---|---|---
PfM3613038| 3/8″-16 Coupler Push-In| 3/8″ to 3/8″| 20
PfM3613012| 1/2″-13 Coupler Push-In| 1/2″ to 1/2″| 20
Push-In couplers have one end that does not require turning threaded rod elements during installation which can be ideal for applications

such as mounting prefabricated hardware and hanger assemblies.

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