Concentric holdown connection
AssigneeSimpson Strong-Tie Company, Inc.
InventorWilliam Leek
Life of this patent
Estimating the term…
Abstract
A concentric holdown connection joining a held building structural member to a holding building structural member including a holdown connector having at least one upright portion operably connected to the held building structural member and a seat portion. A combination member having a threaded opening therethrough connects the holdown member to a threaded anchor member connected to the holding building structural member. In a preferred form the combination member has a donut-like configuration.
Claims31
A concentric holdown connection joining a held building structural member having a bottom end surface to a holding building structural member comprising:
- a. a holdown connector having at least one first upright portion operably connected to said held building structural member and which is integrally joined to a seat portion having an opening therethrough;
- b. an elongated anchor member operably joined to said holding building structural member and having a threaded end portion dimensioned for insertion through said opening in said seat portion;
- and
- c. a combination member formed with a threaded opening for threadably receiving said threaded end portion of said elongated anchor member and having a base dimensioned and formed for engaging substantially the entire area of said seat portion, and having a form and thickness for providing rigidity to minimize deflection of said seat portion at selected design loads and to minimize elevation of said held building structural member above said holding building structural member and to maximize the cross sectional bearing area of said bottom end surface of said held building structural member.
A concentric holdown connection joining a held building structural member to a holding building structural member comprising:
- a. a holdown connector having at least two upright strap members having inner side faces operably connected to said held building structural member and each of which have lower end portions and integrally joined to opposed sides of a seat member which is formed with an opening therethrough;
- b. an elongated anchor member operably joined to said holding building structural member and having a threaded end portion dimensioned for insertion through said opening in said seat member;
- c. a combination member having a donut-like configuration formed with a threaded opening therethrough positioned on the concentric axis of said combination member, and having a base dimensioned and configured for continuous face to face registration with said seat portion extending from closely adjacent the periphery of said opening continuously to said engagement surfaces of said inner side faces of both of said upright strap members, and engaging a substantial portion of said seat;
- and
- d. said combination member being formed, dimensioned and designed using materials to have near zero design deflection within ultimate design loads exerted on said concentric holdown connection.
A concentric holdown connection joining a held circular-like columnar building structural member to a holding building structural member comprising:
- a. a holdown connector having a first upright portion and a second upright portion laterally spaced therefrom which are integrally joined to opposite edges of a seat portion having an opening therethrough and are operably connected to said held circular-like columnar building structural member;
- b. said first and second upright portions are formed in an arc for face to face registration with said circular-like columnar building structural member;
- c. cold formed work hardened portions of said first and second upright portions adjacent said seat portions are deformed inwardly so as to form engagement surfaces for engaging a substantial portion of the perimeter of said combination member;
- d. an elongated anchor member operably joined to said holding building structural member and having a threaded end portion dimensioned for insertion through said opening in said seat portion;
- and
- e. a circular-like combination member formed with a threaded opening for threadably receiving said threaded end portion of said elongated anchor member and having a base dimensioned and formed for engaging a substantial portion of said seat portion.
Dependencies are inferred from the claim text.