HHETA Extra-Heavy Embedded Truss Anchor
Girder Tiedowns for Masonry
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The HHETA provides an engineered method to attach roof trusses securely to concrete and masonry walls. This extra-heavy embedded truss anchor features staggered nail patterns to strengthen uplift resistance and can be used in pairs on single- and multi-ply trusses. The versatile HHETA can be installed straight or field-bent around truss or rafter members.
- Indented embedment line ensures accurate embedment depth
- Compatible with the Simpson Strong-Tie TSS and TBP8 moisture barrier plate
- Load rated for wind and seismic forces
- 14 gauge
- Use all specified fasteners; see General Notes.
- Embedded 4" into a 6" min. concrete beam or 8" nominal grouted block wall.
- For mislocated truss anchors which are greater than 1/8" but less than 1 1/2" from the face of the truss, a shim must be provided. Shim design by truss engineer. When gap is greater than 1 1/2", abandon existing embedded truss anchor and install new anchor per designer.
- Minimum spacing of single anchors is twice the embedment depth for full load. For closer spacing, see loads for double anchor installation.
- In double anchor installations, install anchors with spoons facing outward and straps spaced no more than 1/8" wider than the rafter/truss width. Do not install nails where the straps overlap when wrapped over the rafter/truss.
- Straps do not need to be wrapped over the rafter/truss to achieve tabulated loads, unless noted otherwise.
- Wood Construction Connectors Technical and Installation Notes
- Cold-Formed Steel Connectors Technical and Installation Notes
- General Notes for Wood Construction Connectors
- General Notes for Cold-Formed Steel
Product Information Table
|Model No.||Ga.||H (in.)||Coating/Material||Packaging Qty.|
|HHETA16||14||12||Zinc Galvanized, G90||1|
|HHETA18||14||14||Zinc Galvanized, G90||1|
|HHETA20||14||16||Zinc Galvanized, G90||1|
|HHETA24||14||20||Zinc Galvanized, G90||1|
|HHETA40||14||36||Zinc Galvanized, G90||1|
- Loads have been increased for wind or earthquake loading, with no further increase allowed. Reduce where other loads govern.
- Concrete shall have a minimum compressive strength of f'c = 2,500 psi.
- Grout-filled CMU (GFCMU) shall have a minimum compressive strength of f'm = 1,500 psi.
- For simultaneous loads in more than one direction, the connector must be evaluated using either the Unity Equation or the 75% Rule, as described in Straps and Ties General Notes.
- The HHETA allowable F1 load can be increased to 435 lb. if the strap is wrapped over the truss and a minimum of 12 nails are installed.
- F1 lateral loads listed for double HHETA on 2- or 3-ply rafter/truss may cause an additional 1/16" deflection beyond the standard 1/8" limit where the straps are installed not wrapped over the heel as shown.
- Minimum edge distance for HHETA is 1 1/2" for concrete and 2" for masonry. Where edge distance is less than 2" for masonry, the maximum uplift load is 1,005 lb.
- It is acceptable to use a reduced number of fasteners provided that there is a reduction in uplift allowable load. Calculate the connector allowable load for a reduced number of nails as follows: Allowable Load = (No. of Nails Used) / (No. of Nails in Table) x Table Load. Lateral loads require the lowest 7 nail holes filled for HHETA.
- For double HHETA installations, install half of the required fasteners in each strap.
- Fasteners: Nail dimensions in the table are listed diameter by length. For additional information, see Fastener Types and Sizes Specified for Simpson Strong-Tie Connectors.
Code Reports & Compliance