DPWH Structural Design Overview Lecture

Flashcards covering structural analysis, design parameters, building occupancy, loads (dead, live, wind, earthquake), RC detailing, and foundation design based on DPWH training and NSCP 2015 standards.

The training program titled 'Comprehensive Training for DPWH Field Engineers' was held between _______ 2026.

July - August

The ______ (NSCP), 7th Edition (2015), was developed by the Association of Structural Engineers of the Philippines (ASEP).

National Structural Code of the Philippines

The objective of the NSCP is to assure ______, not to completely eliminate structural damages.

life safety

Hospitals and Public School Buildings fall under Occupancy Category I, which covers ______.

Essential Facilities

Private garages and fences over $1.5\,m$ high are classified as Category V – ______ Structures.

Miscellaneous

According to NSCP 2015 Table 204-1, the material density for Reinforced Concrete (including gravel) is ________.

$$23.6\,kN/m^3$$

The material density of Steel (cold-drawn) is ________.

$$77.3\,kN/m^3$$

NSCP 2015 Table 205-1 lists the uniform live load for school classrooms as ________.

$$1.9\,kPa$$

Typhoon Yolanda prompted a revision of the National Structural Code, increasing the maximum basic wind speed from $250\,kph$ to ________.

$$340\,kph$$

The Basic Wind Speed (V) is defined as the three-second gust speed at ______ above the ground in Exposure C.

$$10\,m$$

The Wind Directionality Factor is represented by the parameter ________.

$$K_d$$

______ includes urban and suburban areas, wooded areas, or other terrain with numerous closely spaced obstructions.

Surface Roughness B

A building is classified as ______ if the wall opening area ratio is greater than or equal to $0.80$.

Open

The Internal Pressure Coefficient ($GC_{pi}$) for Enclosed Buildings is ________.

$$0.18$$

In the Philippines, Seismic Zone 4 has a Z factor of ________.

$$0.40$$

Seismic Source Type ______ describes faults not capable of producing large magnitude earthquakes with a low rate of activity ($M < 6.5$).

C

For storeys with stiffness, weight, or geometric vertical irregularity, the code specifies the use of the ________ Procedure.

Dynamic

The importance factor ($I$) for Essential Facilities in seismic design is ________.

$$1.50$$

Seismic Weight ($W$) must include a minimum of ______ of the floor live load for storage and warehouse occupancies.

$$25\%$$

For non-prestressed concrete cast against and permanently in contact with the ground, the minimum cover is ________.

$$75\,mm$$

The minimum clear spacing between parallel longitudinal reinforcements in columns is the greatest of $40\,mm$, $1.5d_b$, or ________.

$$(4/3)d_{agg}$$

A seismic hook must have a bend not less than ________ and a length of $6d_b$ (minimum $75\,mm$).

$$135^\circ$$

The minimum overall depth ($h$) for a cantilever non-prestressed beam is ________.

$$l/8$$

Columns must have a reinforcement ratio localized within the range of ______ to ______.

$1\%$ to $6\%$

Under NSCP 2015 Section 418.7.5.1, column transverse reinforcement must be provided over a length $L_o$ which is at least the largest of the joint face depth, $L/6$, or ________.

$$450\,mm$$

NSCP 2015 Section 303 requires a geotechnical investigation for structures ______ storeys or higher.

two

For a structural footprint area between $50\,m^2$ and $500\,m^2$, the minimum number of required boreholes is ________.

2

A ______ foundation supports several columns in both X and Y directions, covering the entire area under the structure.

Mat/Raft

During the design phase, the assumed allowable soil bearing capacity for standard school buildings is often ________.

$$96\,kPa$$

Maximum bearing pressure ($q_{max}$) is used for footing design because soil does not have the capacity to carry ________.

tensile loads

One-Way Shear is also commonly referred to as ________.

wide-beam shear

The critical area for Punching Shear (Two-Way Shear) is taken as a distance of ______ from the column perimeter.

$$d/2$$

For rectangular footings, the reinforcements in the short direction must be placed ______ the bars in the long direction.

above

______ members in an ideal truss system are assumed to carry axial force only.

Pin connected

A ______ is a horizontal beam that transfers load from the roofing material to the trusses.

Purlin