Use and design capacity of Rapidbuilt Steel Buildings
Rapidbuilt Steel Buildings come in two forms: open, that is without end walls, and enclosed.
Open hangars have no insulation or other materials under the roof and are made entirely of steel.
The buildings are constructed from steel components only and are intended to be located but not limited to open flat country and at a minimum required fire safety distance from other buildings, whether by local or FEMA ordinance.
Our Standard Rapidbuilt range is not intended to be used for dwelling purposes or any other purposes requiring provision of fire regime stability measures however modifications for specific purposes can be made upon request and then the applicable Local and National building and fire regulations will be taken into account when accommodating the client.
The closed Rapidbuilt Buildings are intended for:
1) Storage for Agricultural purposes
2) Storage of non-flammable or non-explosive materials
3) Storage as Aircraft Hangars
The open Rapidbuilt Buildings are also intended for:
4) Temporary personal shelter from the elements after disasters
5) Temporary buildings for agricultural purposes, machinery or aircraft
Design Capacity of Rapidbuilt Buildings
The deliverable for a Rapidbuilt building is the kit of all the structural parts and components of the building to be erected ONLY in locations satisfying section 1 and with footings satisfying section 2 below. The erection of a Rapidbuilt building is not part of the deliverable, but shall proceed following the instructions that come with the kit. Rapidbuilt building floor provision and footings are not part of the deliverable. End walls components for enclosed shelters, roof insulation and internal ceiling cladding are only to be part of the deliverable, if so agreed with the client.
All Rapidbuilt building material and member capacities have been verified and signed off for by a Member of ASCE, with current membership, satisfying the USA codes ASCE/SEI 7-10 “Minimum Design Loads for Buildings and Other Structures" and ANSI/AISC 360-10 "Specification for Structural Steel Buildings"
Section 1. The 13m, 16m, 18m and the 20m Rapid Snow building is available in four types with load capacities satisfying the Code ASCE/SEI 7-10 “Minimum Design Loads for Buildings and Other Structures" as follows:
a) The roof is classed as non accessible to pedestrians and non storage.
b) Dead Loads: allowance for non flammable insulation materials of mass to 4 kg/m2
c) Live Loads: Code Minimum of 0.58 kPa
d) Seismic Capacity: Shelter founded on “deep” soil under equivalent horizontal acceleration of 0.233g
e) Wind, Snow and Ice Loads vary by building risk or occupancy Category (RC),
Rapid Type A: for RC I: where the wind velocity does not exceed 51m/s (115mph), snow 20psf , ice 1 in
Rapid Type B: for RC II: where the wind velocity does not exceed 51m/s(115mph), snow 20psf , ice 1 in
Hurricane Rapid buildings
Rapid Type C: for RC II: where the wind velocity does not exceed 67m/s(150mph), snow 5psf , ice ¼ in
Rapid Type D: for RC II: where the wind velocity does not exceed 81m/s (200mph), no snow and ice
For 20m, 22m and 24m Rapid Shelters the same Dead, Live and Seismic design capacities apply however, local Wind, Snow and Ice Loads conditions need to be taken into account as different load combinations apply and are all designed for Risk or occupancy Category II
Larger Rapid buildings, the XL range, are under development. They will span 28, 30, 34 and 37m.
Section 2. The rafters for Rapid buildings are spaced at 4m intervals. The lower ends of these rafters are to be attached to footings, which need be capable of resisting the ultimate uplift, down thrust and horizontal forces shown on the drawings provided with the kit. These footings are to be designed, installed and paid for by the client separately. For this purpose the client may need to consult a geo-technical or structural engineer familiar with local founding conditions.