Sanyo ECO G SGP-EW120M2G2W, Технические данные инструкция

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System Design
7. Center-of-gravity and earthquake resistance
D-41
(4) Example anchor bolt calculation
Earthquake-resistance evaluation of Model SGP-EW240M2G2W
1) The earthquake-resistance type is “Common use,” so design horizontal earthquake factor K
H
is 1.0 G.
(K
H
= 1.0 for rooftop installations, and 0.4 for ground installations.)
2) Refer to paragraph (3) on the previous page for the equipment center-of-gravity position.
3) Anchor bolts
Number of bolts = 4
Bolt diameter M12 (12 mm)
Note: If calculations give unacceptable results, change conditions and recalculate.
Example of evaluation using calculations
(1) Anchor bolt conditions
1) Total no. of bolts (N) N = 4 current models have four bolts
2) Bolt diameter (D) D = 12 mm for M12 bolts
3) Bolt cross-sectional area (A) A =
π
D
2
/ 4 = 113 mm
2
4) Bolts on one side (end-on direction, n
1
) n
1
= 2 current models have two bolts
(broadside direction, n
2
) n
2
= 2 current models have two bolts
5) The installation method is for “embedded J or JA type bolts,” on a 15-cm-thick slab
Anchor bolt allowable short-term tensile load (T
a
) Ta = 11,760 N
(The installation method may also be selected after completing calculations.)
(2) Calculation
1) Design horizontal seismic magnitude (K
H
) K
H
= 1.0 Installation location: K
H
roof : 1.0
ground : 0.4
2) Operating load (W) W = 8,330 N
(= operating mass
×
9.8)
3) Horizontal earthquake force (F
H
) F
H
= K
H
・
W
＝
8,330 N
4)Height of center-of-gravity (h
G
) h
G
= 680 mm
5) Vertical earthquake force (F
V
) F
V
= F
H
/ 2 = 4,165 N
6) Distance from center-of-gravity to bolt
End-on direction (L
G1
) L
G1
= 443 mm
Broadside direction (L
G2
) L
G2
= 506 mm