1 / 13

STRUCTURAL FRAMING INSPECTION I

MODULE 6. STRUCTURAL FRAMING INSPECTION I. Building Subsystems. structural framing & foundations enclosure systems plumbing lighting acoustics safety systems electric power & signal systems HVAC. Transfer of forces acting on the building.

adler
Télécharger la présentation

STRUCTURAL FRAMING INSPECTION I

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. MODULE 6 STRUCTURALFRAMINGINSPECTION I

  2. Building Subsystems • structural framing & foundations • enclosure systems • plumbing • lighting • acoustics • safety systems • electric power & signal systems • HVAC

  3. Transfer of forces acting on the building • foundation systems are designed to transmit loads from the structural system directly to the ground • settlement of the completed building must be within acceptable limits • structural systems should be designed to transfer its loads to the foundation • its design must be anticipated in the foundation design

  4. Transfer of forces acting on the building • most building structural systems consists of • floors • roof decks • horizontal members that support the floor and or roof • vertical members that support other components • floor and roof decks or beams that support them, are usually on load bearing walls or columns which carry the load downward • structural systems must be designed to transmit vertical and horizontal loads to the foundations

  5. Transfer of forces acting on the building • vertical walls and columns carry vertical loads downward but • acting alone they are inadequate to resist lateral forces • to help counteract lateral forces • bracing can be implemented into the system • beams can be connected to columns to produce a rigid frame to resist lateral movement • long walls known as shear walls, in two perpendicular directions act like vertical beams in transmitting forces to foundations

  6. Trusses • the strength of the metal connector plates ( gang plates, truss plates) depends on the • grip of the teeth • shear and tensile capacity of the steel plates • identical truss plates are placed directly opposite each other on opposite faces

  7. Trusses • when a truss is axially loaded, the wood fibers press against the teeth and they transfer the load throughout the remaining un-perforated sections of the plate • permanent bracing of a roof truss system is done in the field and must comply with the approved drawings

  8. Principles of wood construction • when in tension, wood is strongest parallel to the grain • if the cross-sectional area of a wood member is reduced by holes • the net area is reduced • the stress-concentrating effect must be considered when figuring out allowable loads • under constant loads, wood deflection will increase slightly with time

  9. Principles of wood construction • wood is very strong when • shear is perpendicular to the grain • wood is not as strong when • shear is parallel to the grain • wood is graded by • species (type of wood) • grade (#1, #2, #3, stud grade) • grade-marking agency • moisture content

  10. Principles of wood construction • wood is a natural insulator • 1 ¼” = RSI 0.22 (R 1.25) batt insulation for 1 ¼” has R 3.25 • wood can be fire rated by being pressure treated with fire-retardant elements • wood that is pressure treated for fire or preservative effects do not loose significant strength

  11. assignment • Perform exercise #1, questions 1 to 23 • Q 22 • Summarize the general rules governing stud posts built into walls. • Q23 • What general rules govern floor framing supported on flat insulating concrete form walls?

More Related