2.3 Construction-Stage Loads

PE Civil: Structural Exam

Track your progress as you read

Finished sections get a check mark.

1 Exam Identity and Reference Workflow

2026 PE Civil: Structural Identity, Format, and Scoring Electronic Handbook, Design Standards, Units, and Version Control

2 Chapter 2: Gravity and Construction Loads

2.1 Dead Loads and Self-Weight 2.2 Live Loads, Reduction, and Load Placement 2.3 Construction-Stage Loads

3 Environmental Loads

Wind Loads and Pressure Paths Seismic Loads and Lateral Force Distribution Snow, Rain, and Ice Loads

4 Moving, Impact, and Lateral Soil Loads

Vehicular, Crane, and Other Moving Loads Impact and Dynamic Allowances Earth Pressure and Surcharge Loads

5 Chapter 5: Load Paths and Combinations

5.1 Tributary Areas and Complete Vertical/Lateral Load Paths 5.2 Strength and Service Load Combinations

6 Reactions, Diagrams, and Basic Axial Effects

Free-Body Diagrams, Reactions, Shear, and Moment Qualitative Diagrams, Influence Lines, and Critical Placement Axial Tension, Compression, and Deformation

7 Chapter 7: Axial Systems and Shear Effects

7.1 Trusses, Braces, and Column Axial Force 7.2 Shear Stress, Shear Flow, and Built-Up Sections 7.3 One-Way, Two-Way, Punching, and Interface Shear Effects

8 Flexure

Section Properties and Elastic Flexural Stress Beam and Slab Flexural Load Effects Biaxial and Unsymmetrical Flexure

9 Combined Stress and Deflection

Combined Axial and Flexural Stress Principal Stress, Mohr's Circle, and Combined Shear Elastic Deflection Methods

10 Chapter 10: Serviceability, Torsion, and Stability

10.1 Serviceability: Deflection, Drift, Vibration, and Ponding 10.2 Torsion and Warping Effects 10.3 Buckling, Effective Length, and Second-Order Stability

11 Fatigue, Robustness, Thermal, and Bearing Effects

Fatigue and Progressive-Collapse Concepts Thermal Deformation and Bearing/Contact Stress

12 Inspections, Submittals, and Adjacent Facilities

Special Inspections and Verification Duties Shop Drawings, Submittals, RFIs, and Delegated Design Construction Effects on Adjacent Facilities

13 Chapter 13: Temporary Works and Safety

13.1 Formwork, Falsework, Scaffolding, Shoring/Reshoring, Bracing, and Anchorage 13.2 Construction, Roadside, and Work-Zone Safety

14 Soils and Core Concrete Properties

Soil Phase Relationships and Classification Soil Strength, Permeability, and Compressibility Fresh and Hardened Concrete Properties

15 Chapter 15: Prestressed Concrete and Steel Properties

15.1 Reinforced, Precast, Pretensioned, and Post-Tensioned Concrete Materials 15.2 Structural and Cold-Formed Steel Properties 15.3 Steel Toughness, Weldability, Corrosion, and Temperature Effects

16 Timber, Masonry, and Material Conformance

Timber Properties and ASD Design Values Masonry, CMU, Mortar, Grout, and Brick Veneer Properties Concrete and Masonry Test Methods Steel, Timber, and Other Material Specification Conformance

17 Horizontal Members I

Steel Beams and Girders Reinforced Concrete Beams and Slabs Timber and Masonry Horizontal Members

18 Chapter 18: Diaphragms and Vertical Members

18.1 Diaphragms, Collectors, Struts, and Composite Slabs 18.2 Steel Columns and Beam-Columns 18.3 Concrete Columns and Bearing Walls

19 Shear Walls, Trusses, and Frames

Shear Walls and Vertical Lateral Members Trusses and Braced Systems Moment Frames and Stability Systems

20 Composite/Bridge Systems and Bolted Connections

Composite Construction and Structural System Selection Bridge Systems and Load Distribution Bolted Steel Connections

21 Chapter 21: Welded, Embedded, and Anchored Connections

21.1 Welded Steel Connections 21.2 Bearing, Embedded, and Precast Connections 21.3 Anchors, Post-Installed Anchors, and Wood/Masonry Connections

22 Shallow Foundations

Isolated, Spread, and Strip Footings Combined and Strap Footings Mat Foundations and Foundation Slabs

23 Deep Foundations

Driven Piles: Axial Capacity and Settlement Drilled Shafts, Piers, and Caissons Pile Groups, Caps, and Lateral Deep-Foundation Response

24 Chapter 24: Retaining Structures

24.1 Lateral Earth/Water Pressure and Drainage 24.2 Sliding, Overturning, Bearing, and Global Stability 24.3 Concrete Cantilever, Gravity, and Basement Walls 24.4 Sheet-Pile, Anchored, and Mechanically Stabilized Earth Walls

2.3 Construction-Stage Loads

Key Takeaways Explain This Topic AI

Every construction stage has its own geometry, support conditions, bracing, material strength, and load path; the completed model is not automatically valid during erection.

Construction-load inventories include fresh concrete, formwork, workers, equipment, stockpiles, delivery effects, temporary supports, and environmental loads applicable to the stage.

Wet concrete is a construction load before curing and can govern forms, joists, shores, supporting floors, and noncomposite steel framing.

Sequence can remove stability, continuity, composite action, or alternate load paths before the permanent system is complete.

Compliance with the specified July 2020 OSHA excerpts addresses safety duties but does not by itself prove structural adequacy.

Last updated: July 2026

A structure is not built in its final configuration. During construction, concrete is wet, steel may be unbraced, connections may be incomplete, precast units rely on temporary braces, and a lower floor may carry shores from work above. These temporary states can govern even when the completed building has ample capacity.

For the July 2026 PE Civil: Structural exam, stay within the April 2024 Civil: Structural specification and its listed editions: ASCE 7-16, ACI 318-14, the AISC Steel Construction Manual 15th edition, and the specified July 2020 Title 29 CFR excerpts . Use the current PE Civil Reference Handbook for mechanics. Do not substitute the April 2027 standards or PE Structural/SE construction content.

A Stage Is a Separate Structural Model

At each stage, ask four questions:

What exists? List installed members, connections, diaphragms, braces, shores, and foundations.

What carries load now? Composite action, continuity, curing strength, and permanent bracing may not yet exist.

What loads are present now? Include material being placed, workers, equipment, stored bundles, temporary systems, and applicable environmental effects.

What changes next? Shore removal, concrete placement, brace release, a pick, or connection completion can transfer load suddenly.

The final analysis model often assumes conditions created only after construction: a cured composite slab braces a steel beam; a complete diaphragm distributes lateral load; a welded or bolted connection has full capacity; a wall has top and bottom restraint. Using those assumptions early can hide an unstable stage.

Construction-Load Inventory

Source How it may act Key question

Fresh concrete Area load based on wet unit weight and thickness Which forms, joists, shores, beams, and floors receive it?

Formwork and falsework Self-weight plus supported placement load Is the temporary load path complete and stable?

Workers and small equipment Distributed or localized load Does a prescribed minimum or concentrated case govern?

Buggies, pumps, cranes, and lifts Point, wheel, impact, or dynamic effect Where can the equipment actually travel or bear?

Stockpiled deck, rebar, masonry, or soil High localized patch load Was a floor designed for the storage location and sequence?

Partially erected framing Reduced bracing, continuity, or composite action What is the unbraced length at this instant?

Wind or other environmental load Lateral/uplift on incomplete geometry Is the permanent lateral system available?

The applicable standard, project documents, engineered means and methods, and problem statement control numerical values and combinations. OSHA provisions set safety requirements within their scope; they are not a substitute for calculating member force, stability, or temporary-support capacity.

Stage-by-Stage Decision Workflow

Define the stage and transition. State what has been installed and what operation occurs.

Draw the temporary load path. Trace load to ground, including forms, shores, reshores, erection braces, and incomplete connections.

Inventory simultaneous loads. Separate uniform, patch, point, dynamic, and environmental actions.

Use stage-appropriate properties. Check actual concrete strength at the time, noncomposite steel properties, temporary unbraced lengths, and connection completion.

Apply the controlling construction combination. Do not borrow a final-state combination without confirming applicability.

Check strength, serviceability, and stability. Local bearing, deflection, overturning, sliding, buckling, and global stability can govern.

Check load transfer at the next step. Removing a shore or brace is itself a structural event.

Document assumptions and hold points. A sequence-dependent design fails if the field sequence silently changes.

Worked Example: Fresh Slab on Form Joists

Form joists at 2.0 ft spacing span 10 ft between supports. They carry a 6 in fresh concrete slab with unit weight 150 pcf, formwork weighing 8 psf, and a specified construction live load of 50 psf. Find the service line load, simple-span reaction at each end, and maximum moment for one joist.

• 1. Fresh concrete load
• q_c = (6/12 ft)(150 pcf) = 75 psf
• 2. Total construction area load
• q_total = 75 + 8 + 50 = 133 psf
• 3. Convert with joist spacing
• w = (133 psf)(2.0 ft) = 266 plf = 0.266 klf
• 4. Reactions

R = wL/2 = (0.266 klf)(10 ft)/2 = 1.33 kips at each end.

• 5. Maximum simple-span moment
• M_max = wL^2/8 = (0.266)(10^2)/8 = 3.33 kip-ft

These are service demands for the stated uniform construction case. A buggy wheel, hose reaction, or stockpile may require a separate concentrated or patch-load analysis. The 75 psf concrete weight must not be added again as permanent slab dead load in the same stage calculation; it is the same physical concrete, classified here by its condition and load path during placement. Later, after curing and shore removal, that slab becomes part of the permanent dead load carried by the completed system.

Three Sequence Traps

Noncomposite steel: A final composite beam may resist load with the cured slab, but during placement the bare steel section can carry wet concrete, deck, workers, and equipment. Its stiffness, strength, lateral bracing, and unbraced length must match that stage.

Shoring and reshoring: Shores can transmit new slab loads into floors below. Removing or relocating them redistributes load among slabs of different ages and strengths. Checking only the newest slab misses the multi-level load path.

Precast or wall erection: A panel that is stable after roof and diaphragm connections are complete may overturn before those connections exist. Temporary braces, anchors, foundations, and release sequence must form a stable system at every step.

Exam-Day Review

For any construction scenario, write the stage next to the sketch. Circle missing permanent elements, draw temporary supports to ground, and label loads by type. Then ask whether self-weight has been counted once, whether localized storage or equipment must be checked separately, whether material properties reflect the actual age/configuration, and whether the next removal or release changes the force path. This discipline prevents the classic error of analyzing a temporary structure as though construction were already finished.