Building Construction Flashcards
Post ‘59 buildings have tie rods installed every ___ feet to attach the walls to the rafter
Every 4’
According to book 29, when “analyzing the situation” during a size up, what should the first consideration be?
Type and construction of the building
According to book 29, what is the size of the rolled tubing in open web trusses?
1-2” cold rolled steel
According to book 29, a single family dwelling using rough cut 2”x4” studs and 1”x6” rafters with a ridge board or just butted together is considered what type of construction?
Bungalow
A single lightweight truss structural member can span how far?
70 feet
Gable roof Rafter size Spacing
Conventional 2x6 or larger 16”-24”
Leightweight 2x3 or 2x4” 24”
Steep pitch 36”
No answer
What is the most common size of for metal gusset plate connectors?
18 gauge with prongs that penetrate 3/8”
What decking is found on conventional gable roofs? Lightweight?
Conventional- 1”x6” space sheating
Leightweight- 3/8” or 1/2” plywood
What is a jack rafter?
A rafter that extends from an outside wall but does NOT reach the ridge board
When were bridge truss roofs constructed?
1930’s-40’s
The wooden truss members of bridge truss roofs are what size?
2”x12”
What are the sizes of the rafters on bridge truss roofs?
2x6” or larger
What type of sheating is found on bridge truss roofs?
1x6 straight or diagonal
Straight pre ‘33
When were bowstring arch truss roofs constructed?
1930’s, ‘40’s, ‘50’s
What size lumber is the arch truss made of?
2”x12” or 2”x14”
What size rafters are on bowstring arch truss roofs?
2”x6” or larger
What size are the rafters and sheating on lamella arch roofs?
Rafters- 2”x12” or larger
Sheating- 1”x6”
Lamella arch roofs will have complete failure when what percent of the roof is severely damaged?
20%
The bottom cord of tied truss roofs are made of what?
5/8” tie rods
What size rafters are on tied truss roofs?
2”x10” or larger
What size are the rafters on sawtooth roofs?
2”x8” or larger
What size rafters are on conventional flat roofs?
2”x6” or larger
Where are nailing blocks found?
Perpendicular to rafters spaced every 4’
Spans of leightweight roofs
Wooden I beam?
Open Web?
Metal gusset plate?
Panelized?
Wooden I Beam- 70’
Open web- 70’ Bar joist- 45’
Metal gusset plate- 80’
Panelized- no limit
