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MDCST Medium Duty Diaphragm Cord Strap Tie

MDCST

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Simpson Strong-Tie tested and load-rated tension straps and fasteners are designed to minimize cost and maximize speed and precision — while providing the strength, versatility and reliability you depend on. The MDCST48 is a 14-gauge high-capacity strap specifically designed to carry tension across a CLT floor or wall panel joint. The MDCST48 installs with Simpson Strong-Tie® Strong-Drive® SDS Heavy-Duty Connector screws.

Key Features

  • Pre-punched screw holes speed fastener installation
  • High capacity eliminates the need for expensive shop-fabricated steel plates
  • Straps may be overlapped to reduce the physical space or footprint needed to transfer high loads across a panel joint

Material

  • 14 ga.

Finish

  • Galvanized (G90)

Installation

  • Use all specified fasteners; see General Notes

Related Literature

Load Tables

Allowable Tension Loads
Model No. Ga. Dimensions (in.) Fasteners
(Total) (in.)
Allowable Tension Loads
W L DF/SP SPF/HF
(160) (160)
MDCST48 14 5 3/4 47 1/2 (44) 1/4" x 3" SDS 11,905 10,560
MDCST48
(Doubled/Overlapped)
5 3/4 47 1/2 (88) 1/4" x 3" SDS 23,810 21,120
  1. Allowable loads have been increased for wind or seismic loading with no further increase allowed; reduce where other loads govern.
  2. If wood tends to split, consider pre-boring holes with diameters not exceeding 0.75 of the nail diameter (2015/2018 NDS 12.1.5.3). Use a 5/32 bit for Strong-Drive SDS Heavy-Duty Connector screws.
  3. Use half of the required fasteners in each member being connected to achieve the listed loads.
  4. Tension loads apply for uplift as well when installed vertically.
  5. When using the MDCST48 as a single strap, fill only round holes. When using the MDCST48 as a double/overlapped strap, fill round and triangle holes.
Floor-to-Floor Clear Span Table
Model No. CLT Plys Clear Span
(in.)
Fasteners
(Total) (in.)
Allowable Tension Loads (DF/SP)
DF/SP SPF/HF
(160) (160)
MDCST48 3 4.125 (36) 1/4" x 3" SDS 11,905 8,640
5 6.875 (36) 1/4" x 3" SDS 11,905 8,640
7 9.625 (32) 1/4" x 3" SDS 10,750 7,680
9 12.375 (28) 1/4" x 3" SDS 9,410 6,720
MDCST48
(Doubled/Overlapped)
3 4.125 (72) 1/4" x 3" SDS 23,810 17,280
5 6.875 (68) 1/4" x 3" SDS 22,850 16,320
7 9.625 (64) 1/4" x 3" SDS 21,505 15,360
9 12.375 (56) 1/4" x 3" SDS 18,815 13,440
  1. Allowable loads have been increased for wind or seismic loading with no further increase allowed; reduce where other loads govern.
  2. Install fasteners as specified by Designer.
  3. If wood tends to split, consider pre-boring holes with diameters not exceeding 0.75 of the nail diameter (2015/2018 NDS 12.1.5.3). Use a 5/32 bit for Strong-Drive SDS Heavy-Duty Connector screws.
  4. Use half of the required nails in each member being connected to achieve the listed loads.
  5. When using the MDCST48 as a single strap, fill only round holes. When using the MDCST48 as a double/overlapped strap, fill round and triangle holes.