DCN - HLTS Structure, Production Version

Document #:

LIGO-E1000371-x0

Document type:

E - Engineering documents

Abstract:

This is a DCN for the production version of the HLTS Structure and its component parts.

Files in Document:

None

Topics:

• Change Control
• Suspensions
• Final Design

Authors:

• Derek Bridges

Keywords:

DCN HLTS structure

Notes and Changes:

HLTS Structure:
D070537-v2: Revised assembly drawing based on revisions to Structural Weldment and Mounting Pad Assembly. Self-clinching nuts have been deleted in favor of tapped holes in the Structural Weldment.

HLTS Structural Weldment:
D070442-v4: Holes have been added for damping struts, HAM Installation Arm, corner pads and installation and alignment equipment. Holes for self-clinching nuts have been changed to tapped holes. Gussets have been removed to allow for placement of dog clamps and vibration absorbers.
D070575-v2: Updated notes (all surfaces must be machined, refer to metal component spec.).
D070580-v2: Updated notes (all surfaces must be machined, refer to metal component spec.).
D070579-v2: Updated notes (all surfaces must be machined, refer to metal component spec.).
D070576-v2: Redesigned to eliminate "mouse hole," which was not large enough to accommodate clamps. Updated notes (all surfaces must be machined, refer to metal component spec.).
D070578-v2: Updated notes (all surfaces must be machined, refer to metal component spec.). Adjusted chamfer size.
D070577-v2: Updated notes (all surfaces must be machined, refer to metal component spec.).

Mounting Pad Assembly:
D0900626-v2: Removed front bracket (although holes in Mounting Pad Body and Structural Weldment still exist, so that it can be attached if necessary).
D070374-v2: Changed clearance holes to slots and updated notes (all surfaces must be machined, refer to metal component spec.).
D0900627-v2: Changed clearance holes to slots and updated notes (all surfaces must be machined, refer to metal component spec.).
D0900628-v2: Changed clearance holes to slots and updated notes (all surfaces must be machined, refer to metal component spec.).

Related Documents:

• LIGO-D070537-v2: Structure, HLTS
• LIGO-D070442-v4: Structural Weldment, HLTS
• LIGO-D070575-v2: Base Plate, Structural Weldment, HLTS
• LIGO-D070580-v2: Top Gusset, Structural Weldment, HLTS
• LIGO-D070579-v2: Upper Front Gusset, Structural Weldment, HLTS
• LIGO-D070576-v2: Lower Front Gusset, Structural Weldment, HLTS
• LIGO-D070578-v2: Side Strut, Structural Weldment, HLTS
• LIGO-D070577-v2: Side Gusset, Structural Weldment, HLTS
• LIGO-D0900626-v2: Mounting Pad Assembly, HLTS
• LIGO-D070374-v2: Mounting Pad Body, HLTS
• LIGO-D0900627-v2: Front Bracket, Mounting Pad, HLTS
• LIGO-D0900628-v2: Side Bracket, Mounting Pad, HLTS