| PART
1 GENERAL |
|
1.1
|
SECTION
INCLUDES |
|
|
A.
|
Vertical
ladders. |
|
|
B.
|
Ship's
ladders. |
|
|
C.
|
Utility
line bridges. |
| 1.2
SUBMITTALS |
| |
A.
|
Submit
under provisions of Section 01300. |
| |
B.
|
Product
Data: Manufacturer's data sheets indicating materials of
construction. |
| |
C.
|
Shop
Drawings: Drawings prepared for this project, showing relationship
of ladders to other construction and methods of anchorage. |
| PART
2 PRODUCTS |
| 2.1
MANUFACTURERS |
| |
A.
|
Acceptable
Manufacturer: Royalite Manufacturing, Inc; 1055 Terminal
Way, San Carlos, CA 94070. ASD. Tel: (650) 637-1440 or (800)
875-9548. Fax: (650) 637-9770. www.royalite-mfg.com. |
| |
B.
|
Substitutions:
Not permitted. |
| |
C.
|
Requests
for substitutions will be considered in accordance with
provisions of Section 01600. |
| 2.2
COMPONENTS |
| |
A. |
|
Ladders: Provide assembled ladders that comply with OSHA
and local building codes, with all edges rounded, clean,
smooth, and burr free; dimensions as indicated on drawings. |
| |
B. |
Ladder
Treads: Extruded aluminum, 6063-T5 alloy, with self-cleaning
serrated top surface and rounded front and back edges; fastened
to handrails with concealed stainless steel screws; capable
of withstanding 1200 pounds (3179 kg) load per tread without
damage. |
| |
|
1.
|
Cross
Section for Vertical Ladders: Minimum 2 inches (50.8 mm)
horizontal, nominal 1 inch (25 mm) vertical. |
| |
|
2.
|
Cross
Section for Ship's Ladders: Minimum 4 inches (101 mm) horizontal,
nominal 1 inch (25 mm) vertical. |
| |
|
3.
|
Width:
24 inches (610 mm). |
| |
|
4.
|
Width:
18 inches (457 mm). |
| |
|
5.
|
Spacing:
12 inches (305 mm) vertically. |
| |
|
6.
|
Landings:
Made up of tread members mounted side-by-side. |
| |
C. |
Vertical
Ladder Rails Supporting Treads: Extruded aluminum, 6063-T5
alloy, with rounded corners, approximately 4 inches (100
mm) deep; mounted so that centerline of tread is minimum
of 7 inches (178 mm) from face of wall. |
| |
|
1.
|
Wall
Brackets: Bent aluminum plate, 2 inches (50 mm) wide by
3/16 inch (5 mm) thick. |
| |
|
2.
|
Base
Brackets: Aluminum angle floor bracket, 2 by 2 by 2 by 1/8
inch (50 by 50 by 50 by 3 mm). |
| |
|
3.
|
Base
Brackets: Wall bracket with additional angle brace; supporting
foot of rail at least 4 inches (100 mm) above floor or grade. |
| |
D.
|
Ship's
Ladder Rails Supporting Treads: Extruded aluminum channel
stringers, 6 by 2 by 1/8 inch (150 by 50 by 3 mm). |
| |
|
1.
|
Base
Brackets: Aluminum angle floor bracket, 2 by 2 by 2 by 1/8
inch (50 by 50 by 50 by 3 mm). |
| |
E.
|
Ship's
Ladder Handrails: Extruded aluminum pipe, 1-1/2 inches (38
mm) outside diameter, Schedule 40 wall thickness; formed
with radiused elbows, welded to stringers. |
| |
F.
|
Extended
Rails: 0.875 inch (22 mm) diameter aluminum tubing; formed
with two parallel tubes for each length of rail, with radiused
corners, assembled by welding or with stainless steel fasteners. |
| |
|
1.
|
Lift-Up
Rail Extensions for Hatch Ladders: 6063T5 aluminum, .77
inch (19.56) x 3.646 inches (92.608 mm) extrusion inside
the standard side rails, manually raised, lowered by means
of releasing gravity latches; and extending a minimum of
42 inches (1067 mm) above top ladder tread. |
| |
|
2.
|
At
Top of Ladders Leading to Roofs or Landings: Extending minimum
of 42 inches (1067 mm) vertically above top of parapet or
landing and extending minimum of 10 inches (254 mm) past
edge of roof or landing; with free walk-through onto roof/landing. |
|
|
G.
|
Cages:
Hoops and verticals of aluminum, 2 inches (50.8 mm) wide
by 0.187 inch (4.75 mm) thick; assembled with stainless
steel fasteners. |
|
|
|
1.
|
Bottom
Hoop: 18 inch (457 mm) radius with overall extension from
wall of 40-3/4 inches (1035 mm). |
|
|
|
2.
|
Intermediate
and Top Hoops: 14 inch (355 mm) radius. |
|
|
|
3.
|
Rest
Platforms: Ladder tread landing, 24 by 36 inches (610 by
915 mm), with 1-1/2 inch (38 mm) outside diameter aluminum
pipe railing enclosing both runs of ladder. |
|
|
H.
|
Utility
Line Bridges: 6063-T5 extruded aluminum supports, ladder
tread landing, and 1/4 inch (6 mm) thick aluminum checker
plate base plates; all joints mitered and welded; for loose
placement on roof surface. |
|
|
I.
|
Security
Door for Vertical Ladder Without Cage: Sheet aluminum enclosure
from 6 inches (150 mm) to 102 inches (2590 mm) above floor
or grade; hinged for access to ladder with full height stainless
steel piano hinge; secured with adjustable staple and plate
for padlock. |
|
|
J.
|
Security
Door for Cage Ladder: Aluminum grid door of same construction
as cage, mounted on bottom of cage, hinged down, with adjustable
staple plate and hasp for padlock. |
| |
K. |
Fall Arrestor: North Safety Products "Saf-T-Climb"
System. |
| |
|
1.
|
Installed
by ladder manufacturer. |
| |
|
2.
|
Rails:
Stainless steel, Type 304 or Type 316L. |
| |
|
3.
|
Rails:
Extruded aluminum. |
| |
|
4.
|
Rails:
Fiberglass reinforced plastic. |
| |
L. |
Anchor
Bolts: Hot-dipped galvanized or stainless steel bolts; diameter
as specified by ladder manufacturer; length as required
to provide adequate anchorage into substrate. |
| PART
3 EXECUTION |
| 3.1
INSTALLATION |
| |
A. |
Install
in accordance with manufacturer's instructions. |
| |
B. |
Anchor
securely using fasteners specified by manufacturer or others
of equivalent or greater strength and corrosion resistance. |
