I believe the song is written in the key of A, if this helps.
For each riff, I just use the strings 
it uses to save a little space.

Riff 1:
[E---2---0------------------------
B-0---0----0-3--0-2--0-0-0----0--
G--------------------------2-2---]

Riff 2:
[E-4-2-0-5--2-0---4-
B--------------3---]

Riff 3:
[E-4-5-7-7-5-7-7-4-5-]

Intro: B5, play Riff 1, pause, 
play again (second time is actually slightly
different)

B5 (Riff 1 twice, no pause)
Shelter
B5		     A		         E
I've been branded, I've been washed around left for dead,
       D	   A	   B5		D A
I've been cast out from this world
       B5           A		   E
I've been exiled, I've been stranded on the street,
       D	  A     B5	D A
Ain't got no place left to run
D (Riff 2) A      B5		   (Riff 1)
No one loves me, anymore, anymore, anymore
D (Riff 2) A	   E
Another heartbeat, down...come on and take me to the
B5	   A			 E	(Riff 3)
Shelter, Shelter, give me what I want tonight
B5	   A			 E
Shelter, Shelter, give me what I want tonight
D A
Shelter

(play Riff 1 twice)

B5	   A			E	 D     A    B5
I've been exiled, I've been raised within the street, 
in this wicked world
D A B5     A	   E    D      A   B5	 D A
Persecution, I'm carrying my cross, down here on my knees
D (Riff 2) A      B5		   (Riff 1)
No one loves me, anymore, anymore, anymore
D (Riff 2) A	   E
Another heartbeat, down...come on and take me to the
B5	   A			 E  (Riff 3)
Shelter, Shelter, give me what I want tonight
B5	   A			 E
Shelter, Shelter, give me what I want tonight
D A   	B5
Shelter

Solo:
[E---2----0-----------------------5----2----5----2-----0-
B-0----0----0-3--0-2------0----0----0----0----0---2-2---
G---------------------2-2-------------------------------
E-----------------------------------------0-0-0-0-2-2-2-2-
B----------0--0--2-2-2-3--3-3-3-3-3-3-3-3-----------------
G-2--2-2-2------------------------------------------------]
(this is basically a run up the A scale starting on A)

Chords (played during solo):
B5	B5 A E D A E A B5 D D
...come on and take me to the
B5	   A			 E   (Riff 3)
Shelter, Shelter, give me what I want tonight 
(give me your loving)
B5	   A			 E    (Riff 3)
Shelter, Shelter, sleeping on the street tonight 
(give me your loving)
B5	   A			 E     (Riff 3)
Shelter, Shelter, give me what I want tonight 
(give me your loving)
B5	   A			 E
Shelter, Shelter, give me what I want tonight

A D A D A D

Outro:
[E---------------------
B---------------------
G-----2-4-4-2-4-4-2-4-
D-4-4-----------------]