# Northbrook Insurance Company
Northbrook, Illinois

## Endorsement

**Named Insured:** International Business Machines Corp.
**Policy No.:** 63-003-053
**Endorsement No.:** 6 (Page 1 of 2)

In consideration of the premium charged it is agreed that this policy shall not apply:

1. To property damage to:
   - (a) equipment or property to be used in, a part of, or incidental to any construction operations; or
   - (b) that portion of any property upon which operations are being performed by or on behalf of any Insured in the course of construction, reconstruction or repair.

2. To personal injury or property damage for:
   - (a) any liability arising out of joint venture which is not designated in the Declarations;
   - (b) any liability arising out of any project insured under a "wrap-up" or similar rating plan.

3. Except insofar as coverage, other than limits, is provided in the underlying insurance at the limits specified in the Schedule of Underlying Insurance in the Declarations to:
   - (a) property damage included within the Explosion Hazard – includes property damage arising out of blasting or explosion. The Explosion Hazard does not include property damage (1) arising out of the explosion of air or steam vessels, piping under pressure, prime movers, machinery or power transmitting equipment, or (2) arising out of operations performed for any Insured by independent contractors, or (3) included within the Completed Operations Hazard or the Underground Property Damage Hazard, or (4) for which liability is assumed by any Insured under an Incidental Contract.

The Collapse Hazard – includes "structural property damage" as defined herein and property damage to any other property at any time resulting therefrom. "Structural property damage" means the collapse of or structural injury to any building or structure due to (1) grading of land, excavating, borrowing,

This endorsement to take effect on the 21st day of May 1977. All other terms and conditions remain unchanged.

Countersigned: May 20, 1977
Authorized Representative: Richard J. Fox

**INURED COPY**