COMPUTATION OF LOADSDEAD LOAD

ROOFING MATERIALS

Using the following materials:

Corrugated Galvanized Iron SheetsInsulation, polystyrene foam (10mm thk.)

Total Pressure

Bay Distance = 6 m

Force, P Tributary Area

0.41925 2.5155 0.4880.59425 3.5655 0.6920.8385 5.031 0.976

0.7 4.2 0.8150.6195 3.717 0.7210.539 3.234 0.627

Solving for the equivalent concentrated load P given the figure shown below.

Effective width

Equivalent Nodal Load (Full Bay Distance)

P1 m2P2 m2P3 m2P4 m2P5 m2P6 m2

Source: National Structural Code of the Philippines (6th Edition), 2010. Table 204-2. Minimum Design Loads (kPa)

COMPUTATION OF LOADSDEAD LOAD

= 0.19 kPa= 0.004 kPa

= 0.194 kPa

0.488 kN 0.244 kN0.692 kN 0.346 kN0.976 kN 0.488 kN0.815 kN 0.407 kN0.721 kN 0.361 kN0.627 kN 0.314 kN

Solving for the equivalent concentrated load P given the figure shown below.

Equivalent Nodal Load (Full Bay Distance)

Equivalent Nodal Load (Half Bay Distance)

COMPUTATION OF LOADSLIVE LOAD

ROOF LIVE LOAD

Source: National Structural Code of the Philippines 6th Edition, 2010

Referring to the table above, the designed roof slope belongs to No. 1 category.Since the tributary area is Then, for Load factor, use = 1 kPa

Bay Distance = 6 m

Force, P Tributary Area

0.3 1.8 1.800 kN 0.900 kN0.6 3.6 3.600 kN 1.800 kN

0.7472 4.4832 4.483 kN 2.242 kN0.8944 5.3664 5.366 kN 2.683 kN0.7362 4.4172 4.417 kN 2.209 kN0.289 1.734 1.734 kN 0.867 kN

0 to 20 m2

Effective width

Equivalent Nodal Load (Full Bay Distance)

Equivalent Nodal Load (Half Bay Distance)

P1 m2P2 m2P3 m2P4 m2P5 m2P6 m2

COMPUTATION OF LOADSLIVE LOAD

COMPUTATION OF LOADSWIND LOAD

Using NSCP 6th Edition, 2010

From ASEP Minimum Design Loads, Section 207 (Wind Load)Importance Factor = 1.15

Wind Speed V = 150Exposure Category: C = 9.5Zg = 275

Wind Directionality Kd = 0.85

Reference:* Importance factor (Iw) for the building or other structure at category 1 - Essential, from Table 207-3,

page 2-24 (NSCP 6th Edition).* Wind Speed classified at Zone 3, Davao del Sur province, from Table 207-1, age 2-23 (NSCP 6th Edition).* Terrain Exposure Constants from Table 207-5, page 2-27 (NSCP 6th Edition).* Wind Directionality Factor (Kd) from Table 207-2, page 2-23 (NSCP 6th Edition).

Details of the designed three-hinged arch:Angle of the Roof = 26.565 degreesHeight above ground level z = 15 mMean roof height h = 7.65 mSpan distance L = 25.2343 mMean roof width w = 14.3 mBay distance b = 5 m

Solving for Velocity Pressure Exposure Coefficient (Kz) evaluated at height z:

= z = 15 = 0.8755278Zg 275

Solving for Velocity Pressure Exposure Coefficient (Kz) evaluated at height z:

= 1 Note: Site conditions and locations of structures do not meet all the conditionsspecified in Section 207.5.7.1.

From ASEP Minimum Design Loads, Section 207 (Wind Load)Gust Effect Factor G = 1.15

Enclosure classification Open buildingInternal Pressure Coefficient GCpi = 0.85

h = 7.65 = 0.3031588L 25.2343

Eq. 207-15, NSCP 6th Ed. 2010

= 0.876 ) ( 1 ) ( 0.85 ) ( 150 1.15 )= 1.0403044

Iw

Kz 2.01 ( )2/ 2.01 ( )2/7

Kzt

Solving for Velocity Pressure, qz :

qz 47.3 x 10-6 ( )2 ( _=. ^( ) _ _ _ ^ _

COMPUTATION OF LOADS COMPUTATION OF LOADSWIND LOAD WIND LOAD

Wind Speed classified at Zone 3, Davao del Sur province, from Table 207-1, age 2-23 (NSCP 6th Edition).

Interpolation for Roof Pressure Coefficients:Angle of the Roof = 26.565 degrees

Coeffiecient is between 25 to 30 degrees.For Windward:

Suction: Pressure:25 - 26.565 = -0.2 - x 25 -25 - 30 -0.2 - -0.2 25 -

x = -0.2

Note: Site conditions and locations of structures do not meet all the conditions For Leeward:Since the roof angle is equal to 26.565 > 20 degrees,

use -0.6 for coefficient factor for leeward suction.

Eq. 207-15, NSCP 6th Ed. 2010

1.0403044 kPa

Figure 207-6 - External Pressure Coefficients, Cp on Walls and Roofs of Enclosed. Partially Enclosed Buildings (NSCP 6th Ed. 2010)

COMPUTATION OF LOADS COMPUTATION OF LOADSWIND LOAD WIND LOAD

Wind loadsBay Distance = 5 mAngle of the Roof = 26.565

Windward Suction = -0.2080609 kPaFull Bay Distance

Effective width1 0.3 -0.140 kN 0.2792 0.6 -0.279 kN 0.5583 0.7472 -0.348 kN 0.6954 0.8944 -0.416 kN 0.8325 0.7362 -0.343 kN 0.6856 0.289 -0.134 kN 0.269

Windward Pressure = 0.3120913 kPaFull Bay Distance

Effective width1 0.3 0.209 kN -0.4192 0.6 0.419 kN -0.8373 0.7472 0.521 kN -1.0434 0.8944 0.624 kN -1.248

Pressure: 5 0.7362 0.514 kN -1.0286 0.289 0.202 kN -0.403

26.565 = 0.3 - x30 0.3 - 0.3Leeward Suction = -0.624 kPa

x = 0.3 Full Bay Distance

Effective width1 0.3 0.419 kN 0.8372 0.6 0.837 kN 1.6753 0.7472 1.043 kN 2.0864 0.8944 1.248 kN 2.4975 0.7362 1.028 kN 2.0556 0.289 0.403 kN 0.807

PX PY

PX PYFigure 207-6 - External Pressure Coefficients, Cp on Walls and Roofs of Enclosed. Partially Enclosed Buildings (NSCP 6th Ed. 2010)

PX PY

COMPUTATION OF LOADSWIND LOAD

degrees

Full Bay Distance Half Bay Distance

kN -0.070 kN 0.140 kNkN -0.140 kN 0.279 kNkN -0.174 kN 0.348 kNkN -0.208 kN 0.416 kNkN -0.171 kN 0.343 kNkN -0.067 kN 0.134 kN

Full Bay Distance Half Bay Distance

kN 0.105 kN -0.209 kNkN 0.209 kN -0.419 kNkN 0.261 kN -0.521 kNkN 0.312 kN -0.624 kNkN 0.257 kN -0.514 kNkN 0.101 kN -0.202 kN

Full Bay Distance Half Bay Distance

kN 0.209 kN 0.419 kNkN 0.419 kN 0.837 kNkN 0.521 kN 1.043 kNkN 0.624 kN 1.248 kNkN 0.514 kN 1.028 kNkN 0.202 kN 0.403 kN

PY PX PY

PY PX PY

PY PX PY

DEAD LOADLIVE LOADWIND LOAD