Office Equipment. Following Closing, until the earlier of ninety (90) days after the Closing Date or the date that is thirty (30) days after receipt by Seller of written notice by Purchaser, # the Seller Parties shall make available for Purchaser's reasonable use in connection with the Seller Business the office equipment and other personal property specified on [Schedule 7.5] (the “Office Equipment”), and # Purchaser shall, as consideration for such use, pay to or as directed by Seller in advance a monthly cash payment in the amount set forth in the Transition Services Agreement.

For purposes of this Agreement, the term “A.M. Castle’s Business” shall mean any business in which Employer or any of its subsidiaries is engaged, including, without limitation, the business of distributing specialty metals to customers within the producer durable equipment, aerospace, heavy industrial equipment, industrial goods, construction equipment, oil

structure) ceilings, partitions (load-bearing or demising), columns or floor, or to the fire protection, water, sewer, waterproofing, windows, building skin, vertical transportation system, security, electrical, mechanical, plumbing, HVAC or any other base building systems, of the Premises, the Commercial/Garage Unit or the Building.

Landlord shall provide reasonably sufficient electricity to the Premises (including adequate electrical wiring and facilities for connection to Tenant's lighting fixtures and incidental use equipment), provided that the connected electrical load of Tenant's lighting fixtures and the incidental use equipment does not, in the aggregate, exceed the connected electrical loads typically required at First Class Life Sciences Projects. Tenant will design Tenant's electrical system serving any equipment producing nonlinear electrical loads to accommodate such nonlinear

If the employer maintains one or more defined contribution plans (including any Simplified Employee Pension Plan) and the employer has not maintained any defined benefit plan that during the five-year period ending on the determination date(s) has or has had accrued benefits, the top-heavy ratio for this plan alone or for the required or permissive aggregation group as appropriate is a fraction, the numerator of which is the sum of the account balances of all key employees as of the determination date(s) including any part of any account balance distributed in the one-year period ending on the determination date(s) (five-year period ending on the determination date in the case of a distribution made for a reason other than severance from employment, death or disability and in determining whether the plan is top-heavy for plan years beginning before January 1, 2002), and the denominator of which is the sum of all account balances including any part of any account balance distributed in the one-year period ending on the determination date(s) (five-year period ending on the determination date in the case of a distribution made for a reason other than severance from employment, death or disability and in determining whether the plan is top-heavy for plan years beginning before January 1, 2002), both computed in accordance with Code section 416 and the regulations thereunder. Both the numerator and denominator of the top-heavy ratio are increased to reflect any contribution not actually made as of the determination date, but which is required to be taken into account on that date under Code section 416 and the regulations thereunder.

Elective deferrals (and for plan years beginning before January 1, 2002 employer matching contributions) will not be taken into account for the purpose of satisfying the minimum top-heavy contribution requirement. However, qualified nonelective contributions and employer matching contributions (for plan years beginning on or after January 1, 2002) may be taken into account for this purpose as provided in [Section 3.2(c) or 3.3(b)])], as appropriate.

Top-Heavy Plan. This Plan is top-heavy if any of the following conditions exist:

Top-Heavy Plan. The Plan shall be deemed “Top-Heavy” with respect to any Plan Year if, as of the last day of the preceding Plan Year (the “Determination Date”), the present value of the cumulative account balances for “Key Employees,” as defined in Code Section 416(i), under the Plan and all other plans in the “Aggregation Group,” as defined below, exceeds 60% of the present value, as of the Determination Date, of the cumulative account balances under all such plans for all employees of the Affiliates. For purposes of this Article XI, # the term “Aggregation Group” shall mean each plan of the Affiliates in which a Key Employee participates and each other plan of the Affiliates that enables such plan to meet the requirements of Code Section 401(a)(4) or 410; # the present value of such account balances shall be computed in accordance with Code Section 416(g); and # the above percentage ratio shall be determined as of the Determination Date by a fraction, the numerator of which is the sum of the present value of the account balances of Key Employees under the Plan and all other plans in the Aggregation Group and the denominator of which is the sum of the present value of the account balances under all such plans, including the Plan, for all employees of the Affiliates. The accrued benefits of a Participant who did not perform any services for an Employer during the one-year period ending on the Determination Date shall be disregarded.

Third Floor Additional Premises: Third Floor Commencement Date. Effective as of the date hereof (the “Third Floor Commencement Date”), the premises located on the third (3rd) floor of the Building and outlined on attached Exhibit A-l and labeled “Third Floor Additional Premises” shall be added to the Lease. The parties hereby agree that, for all purposes of the Lease, the Third Floor Additional Premises shall be deemed to consist of 3,100 rentable square feet of space.

“Floor Plan Financing” means any floor plan financing or other indebtedness incurred by any Loan Party or any of its Restricted Subsidiaries (including Indebtedness in respect of Open Accounts) for the purposes of financing all or a portion of the purchase of Equipment Inventory.