HP LH4r HP Netserver Rack Configuration Guide - Page 13

Configuration Details Weight and Balance Worksheet: 1. Total the weight of operator serviceable slide-mounted products: M2 M1 M1 A =______lbs; B =______lbs; C =______lbs; D =______lbs; . . . 250 N or a 2. Total the weight of all fixed and trained service personnel serviceable products: 56.25 lbs @ max M2 a =______lbs; b =______lbs; c =______lbs; d =______lbs; . . . height = 2 m b 3. Calculate the moment for both totals (M1 and M2) from above: Model M1 M2 1.25 m 1.6 m 1.96m (A + B + C + D . . .) * 1.25 ft (A + B + C + D . . .) * 1.25 ft (A + B + C + D . . .) * 1.25 ft -45.4 ft-lbs + (a + b + c + d + . . .) * 1.00 ft -92.1 ft-lbs + (a + b + c + d + . . .) * 1.00 ft -136.4 ft-lbs + (a + b + c + d + . . .) * 1.00 ft M1 = Moment on rack with all operator serviceable slide-mounted products extended. M2 = Moment of all fixed and trained personnel serviceable slide-mounted products and rack. M2 moment calculations assume a 1.00 ft center of gravity for installed products If M1 is less than or equal to M2, no additional counter weight is needed. If M1 is greater than M2, use the formulas below to determine the required counter weight. Force (in lbs) = (M1 - M2) ft-lbs ÷ 2.46 ft = amount of force required @ 2.46 ft X = Force (lbs) ÷ 30 lbs = number of C2790A 30 lbs ballast kits to install, where "X" is rounded up to the next highest integer, e.g., 1.2 = 2 ballast kits. c d A 1 ft B Center of Gravity C F D 1.25 ft Note: You may choose not to install ballast weights if only trained service personnel will perform service, if the anti-tip foot is used during servicing or installation, and not more the one device is extended from the rack at any time. If using ballast, fill in the selection list on page 3 with the calculated number of ballast required. Stability: Weight is a consideration when stacking the rack. In general, place the heaviest devices near the bottom of the rack for greatest stability and servicing. Put lighter devices and seldom accessed devices (such as monitors and rack-optimized storage modules) near the top of the rack. 6 Choose between the /E or /U rack line. Choose the Rack System/E if you answer 'yes' to any of the following questions: s Will you need to ship rack integrated? s Do you want the option to increase the rack space by 8U for future growth? s Is the equipment to be mounted over 1000 lbs.? s Do you want optimum stability while servicing slide-mounted equipment? s Do you require between 33U and 41U of vertical mounting space in a single rack? s Does your equipment require optimum ventilation? If you did not answer 'yes' to ANY of the above questions, remember the /E line is a full-featured, premium line while the /U line is a basic, utility rack line with limited configuration choices. See pages 4 and 5 for more differentiating details. Fill in the selection list on page 3 with the rack sizes and quantity. 7 Determine all additional items required. When applicable, choose the appropriate size. (See the appropriate page for features.) Fill in the Selection list on page 3 with the quantity of all additional items: s Delivery services - pages 4 and 5 s Cord sets - page 7 s Front doors - page 6 s Switchboxes - page 7 s Tie kits - page 6 s Rackmount kits - page 8 s Side panel kits (/E line only) - page 6 s Accessories - pages 9-10 s PDUs - page 7 8 Double check your list. Go back through your notes and make sure all quantities have been included into the selection list on page 3. Congratulations! You're now ready to place your order. 13